Opinion of the Advocate General — ECLI:EU:C:2021:451
Date: 2021-06-03
Language of the case: English
Subject matter: State aids;Competition
Procedure: Action for annulment - unfounded;Appeal - successful
Origin: United Kingdom

OPINION OF ADVOCATE GENERAL TANCHEV delivered on 3 June 2021(1) Case C‑57/19 P European Commission v Tempus Energy Ltd and Tempus Energy Technology Ltd (Appeal — State Aid — Great Britain electricity capacity market — Decision not to raise objections — Concept of serious difficulties — Standard of proof — Commission’s obligation to carry out a diligent and impartial examination of the information provided by the Member State concerned — Commission’s obligation to investigate a case of its own motion — Pre-notification contacts) Table of contents I. Legal framework II. Background to the proceedings III. Judgment under appeal IV. Proceedings before the Court of Justice and forms of order sought V. Analysis A. The appeal 1. Arguments of the parties 2. Assessment (a) The Commission’s request that the Court set aside the judgment under appeal in so far as it did not declare inadmissible Tempus’ allegation concerning the 2 MW de minimis participation threshold (b) Admissibility of the appeal (c) Substance (1) Preliminary observations (2) The first part of the single ground of appeal (i) Whether, in order to show that serious difficulties existed, Tempus may rely on all the relevant information that was or could have been available to the Commission on the date of adoption of the decision at issue (ii) Whether the number and origin of observations spontaneously made by third parties may be taken into account as an indication of the existence of serious difficulties (iii) Whether the length of the pre-notification phase may be taken into account as an indication of the existence of serious difficulties (iv) Whether the complexity and novelty of the measure at issue may be taken into account as an indication of the existence of serious difficulties (3) The second part of the single ground of appeal (i) Whether the Commission should have investigated the potential role of DSR operators within the capacity market (ii) Whether there was sufficient examination of the discriminatory or disadvantageous treatment of DSR operators in respect of the length of capacity contracts (iii) Whether there was sufficient examination of the discriminatory or disadvantageous treatment of DSR operators in respect of the cost recovery method adopted (iv) Whether there was sufficient examination of the discriminatory or disadvantageous treatment of DSR operators in respect of the interplay between the T4 and the T1 auctions and of some conditions of participation in the capacity market B. The action before the General Court VI. Costs VII. Conclusion 1. By this appeal, the European Commission requests the Court of Justice to set aside the judgment of 15 November 2018, Tempus Energy and Tempus Energy Technology v Commission (‘the judgment under appeal’), (2) by which the General Court annulled the Commission decision not to raise objections to an aid scheme adopted by the United Kingdom to support capacity providers in the electricity market in Great Britain (‘the decision at issue’). (3) 2. Because the United Kingdom estimated that around the years 2017/2018 the electricity capacity generation in Great Britain would no longer be sufficient to meet demand, it decided to establish, through the aid scheme referred to in the preceding point, a capacity market where auctions organised by the national authorities would allow procuring the level of capacity required to ensure generation adequacy. Under that scheme, successful participants in those auctions were to receive a steady payment in return for their commitment to deliver electricity at times of system stress. That payment was to be financed through a levy on electricity suppliers. 3. In the decision at issue, the Commission considered the aid scheme described above to be compatible with the internal market pursuant to Article 107(3)(c) TFEU, as it satisfied the criteria set out in the Guidelines on State aid for environmental protection and energy 2014-2020 (‘the Guidelines’) (4). 4. By the judgment under appeal, the General Court upheld the action for the annulment of the decision at issue brought by Tempus Energy Ltd and Tempus Energy Technology Ltd (together, ‘Tempus’), on the ground that the Commission could not adopt that decision on completion of a mere preliminary examination, and that it should have initiated the formal investigation procedure provided for in Article 108(2) TFEU. In the view of the General Court, a body of objective and consistent indications consisting in, first, the length and the characteristics of the pre-notification phase, and, second, the lack of appropriate investigation by the Commission with regard to certain aspects of the capacity market, demonstrated that the serious difficulties that arose from the assessment of the compatibility of the scheme with the internal market had not been overcome during the preliminary examination. 5. This case presents the Court with an opportunity to rule on the concept of ‘serious difficulties’, the existence of which on completion of a preliminary examination triggers the obligation for the Commission to initiate the second stage of the procedure for reviewing State aid, namely the formal investigation procedure. I. Legal framework 6. Article 4 of Council Regulation (EC) No 659/1999, (5) entitled ‘Preliminary examination of the notification and decisions of the Commission’, provides: ‘… 3. Where the Commission, after a preliminary examination, finds that no doubts are raised as to the compatibility with the [internal] market of a notified measure, in so far as it falls within the scope of [Article 107(1) TFEU], it shall decide that the measure is compatible with the [internal] market (hereinafter referred to as a “decision not to raise objections”). The decision shall specify which exception under the Treaty has been applied. 4. Where the Commission, after a preliminary examination, finds that doubts are raised as to the compatibility with the [internal] market of a notified measure, it shall decide to initiate proceedings pursuant to [Article 108(2) TFEU] (hereinafter referred to as a “decision to initiate the formal investigation procedure”). ...’ II. Background to the proceedings 7. Tempus holds a licence to operate as an electricity supply business in the United Kingdom and sells electricity consumption management technology, also known as ‘demand-side response’ (‘DSR’), to individuals and professionals. 8. Tempus helps its customers to move their non-critical electricity usage to periods when wholesale prices are low, either because demand is low or because power from renewable sources is plentiful and therefore cheaper. For that purpose, like other demand-side response operators (‘DSR operators’), Tempus enters into contracts with energy customers, which are often industrial and commercial customers or small- to medium-sized enterprises, under which the customer agrees to be flexible in the consumption of their electricity at a particular time period. The DSR operator then calculates the total capacity available from all of the flexible customers at any one time and offers that capacity to the electricity network operator — National Grid (‘NG’) in the present case — in exchange for a payment, which it passes back to the flexible customer, whilst retaining a small profit margin for itself. 9. By relying on the United Kingdom Energy Act 2013 and the regulatory acts adopted on the basis of that Act, in particular the Electricity Capacity Regulations 2014 and the Capacity Market Rules 2014, the United Kingdom adopted an aid scheme to support capacity providers in the electricity market in Great Britain (‘the measure at issue’). Through that measure, the United Kingdom establishes an electricity capacity market involving centrally-managed auctions to procure the level of capacity required to ensure capacity adequacy. Capacity providers are remunerated in exchange for their commitment, otherwise penalties apply, to provide electricity or reduce or delay their electricity consumption during times of system stress. 10. The capacity market works as follows. 11. The amount of capacity required is decided centrally by the United Kingdom Government on NG’s recommendation. The decision on how much capacity to contract in each capacity auction is based on a reliability standard. A reliability standard is an objective level of security of electricity supply. The United Kingdom Government has set a reliability standard equal to a loss of load expectation of 3 hours/year, which translates as a system security level of 99.97%. The loss of load expectation is the number of hours/periods per annum in which, over the long term, it is statistically expected that supply will not meet demand. 12. Each year, the capacity to be delivered four years later is auctioned (‘the T‑4 auction’). The capacity that was auctioned in 2014, for example, was to be delivered in 2018/2019, the delivery period running from 1 October 2018 to 30 September 2019. However, another auction takes place during the year prior to the delivery year of the main auction (‘the T‑1 auction’). The T‑1 auction ensures that the right amount of capacity is procured when more accurate demand forecasts are available and is important for enabling DSR capacity to actively participate in the mechanism (as DSR operators find it difficult to participate in an auction four years ahead of delivery). 13. Some capacity is held back from the T‑4 auction and ‘reserved’ for the T‑1 auction. The amount of reserved capacity is to be based on an estimate of the ‘cost-effective’ DSR that could participate in the T‑1 auction. If demand falls between the T‑4 auction and the T‑1 auction, the amount of capacity auctioned in the T‑1 auction will be reduced. According to the decision at issue, the United Kingdom Government committed to procure in the T‑1 auctions at least 50% of the capacity ‘reserved’ four years earlier. T‑4 and T‑1 auctions form the enduring regime. In addition to that regime, there is a transitional regime (as, prior to the delivery period 2018/2019, ‘transitional’ auctions are scheduled, principally aimed at DSR operators). 14. Existing and new generators, DSR operators and storage operators are allowed to participate in the enduring auctions (with the temporary exception of interconnectors and foreign capacity providers). Generators and DSR operators participating in the capacity market are called ‘Capacity Market Units’ (‘CMUs’). They have to undergo a pre-qualification process, the purpose of which is to ensure that participants in the auction can deliver the capacity they offer. DSR CMUs are defined with reference to a commitment to reduce demand, which should result in their customers reducing the import of electricity and/or exporting electricity generated by on-site generating units. 15. Each auction is a descending-clock, pay-as-clear auction in which all successful participants are paid the last-accepted bid. A high price is announced at the beginning of the auction, and participants submit bids to indicate how much capacity they are willing to supply at that price. This process is repeated in successive rounds according to a predetermined schedule until the auction establishes the lowest price at which demand equals supply, being the clearing price. All successful participants are paid the same clearing price. 16. If successful at the auction, capacity providers are awarded a capacity agreement at the clearing price. Capacity agreements differ in terms of their length. Most existing capacity providers are to have access to one year agreements. However, capacity providers undertaking capital expenditure above 125 pounds sterling (GBP) per kilowatt (kW) (around EUR 141) — which is the case where a plant is refurbished — are eligible for capacity agreements of up to a maximum of 3 years. Capacity providers undertaking capital expenditure above GBP 250 per kW (around EUR 282) — which is the case where a new plant is built — are eligible for capacity agreements of up to a maximum of 15 years. Agreements longer than one year will only be available to participants in the T‑4 auctions. 17. Capacity payments to capacity providers equal the amount of capacity that those providers have bid, multiplied by the clearing price. The costs incurred to fund capacity payments are paid by all licensed electricity suppliers (‘the cost recovery method’) by means of a charge imposed on those suppliers (‘the suppliers’ charge’). The suppliers’ charges are determined based on their forecast market share and calculated based on demand measured between 16.00 and 19.00 on all weekdays from November to February, in order to incentivise suppliers to reduce their customers’ electricity demand at those times when demand is typically the highest. According to the decision at issue, this should reduce the amount of capacity that is needed, thereby also reducing the costs of the capacity market. 18. By the decision at issue, the Commission decided not to raise objections to the measure at issue and authorised it for a maximum period of 10 years. According to that decision, that measure constituted State aid, but it was compatible with the internal market pursuant to Article 107(3)(c) TFEU as it was consistent with the criteria set out in Section 3.9 of the Guidelines, entitled ‘Aid for generation adequacy’. III. Judgment under appeal 19. As mentioned in point 1 above, by the judgment under appeal, the General Court annulled the decision at issue on the ground that the Commission had failed to initiate the formal investigation procedure provided for in Article 108(2) TFEU. 20. First, the General Court held that the Commission cannot restrict itself to the preliminary stage of the procedure for reviewing State aid, but is under an obligation to initiate the formal investigation procedure, where the preliminary examination does not permit all doubts as to the compatibility of the planned measure with the internal market to be eliminated. According to the General Court, Tempus bore the burden of establishing the existence of such doubts. To that end, it was not necessary that Tempus adduced sufficient evidence that the measure at issue was incompatible with the internal market. Rather, it was sufficient that it set out its reasons for considering that the Commission should have had doubts as to that measure’s compatibility. Further, in the view of the General Court, Tempus could rely not only on all relevant information that was available to the Commission on the date when it adopted the decision at issue, but also on all relevant information that could have been available to it on that date. This was because the Commission could and, where necessary, had to seek relevant information from other sources, rather than limit its analysis to the information contained in the notification. 21. Secondly, the General Court recalled that, according to case-law, the scale of the area covered by the preliminary examination and the complexity of the matter may indicate the existence of doubts. It noted that, in the present case, the measure at issue was significant, complex and novel. Further, it considered that the fact that the preliminary examination had lasted only a month, which was less than the two-month period provided for in Article 4(5) of Regulation No 659/1999, was not a reliable indication that no doubts arose at the end of that examination, as account had to be taken of the pre-notification phase, which had lasted around 18 months and thus exceeded the two-month period envisaged, as a general rule, by the Best Practices Code on the conduct of State aid control proceedings, adopted by the Commission on 16 June 2009 (‘the Best Practices Code’). (6) Moreover, at the end of that long pre-notification phase, the Commission still had doubts as to the compatibility with the internal market of the measure at issue, since it requested additional information from the United Kingdom on some key aspects. The General Court concluded that the length of the pre-notification phase, as well as the fact that three different types of operators had submitted observations in respect of the measure at issue, were an indication that doubts existed. Then, it found it appropriate to examine whether factors relating to the content of the decision at issue could also indicate that the Commission should have had doubts. 22. Thirdly, the General Court took the view that the Commission’s insufficient examination of the potential role of DSR within the capacity market was an indication that doubts arose as to the compatibility of the measure at issue with the internal market. Given that the decision at issue referred to the report compiled on 30 June 2014 by a panel of technical experts (‘the PTE’), which pointed at the lack of existing comprehensive data on DSR potential (‘the PTE’s Report’), the Commission was aware of the difficulties regarding the appreciation of DSR potential, and, therefore, of the risk that the measure at issue would fail to sufficiently take into account that potential. Nevertheless, far from carrying out its own appreciation of DSR potential, the Commission accepted the modalities envisaged by the United Kingdom (namely, inter alia, that information would be revealed in the first T‑4 auction, and that NG would launch a study concerning DSR potential). 23. Fourthly, the General Court considered that the Commission had failed to sufficiently examine whether DSR operators were discriminated against as compared with generators. 24. As regards, in the first place, the length of capacity contracts, the General Court noted that DSR operators could be offered solely one-year contracts, whereas certain generators (those building new plants or refurbishing existing plants) could be offered contracts of up to 3 or 15 years. The General Court further noted that the reason why certain capacity providers (namely, those building new plants or refurbishing existing plants) were offered contracts of longer than one year was their level of capital expenditure and the difficulties encountered in securing financing for their investment. In the view of the General Court, given that the information provided to the Commission by the United Kingdom concerned only the financial needs of generators building new plants, the Commission should have gathered more information itself on the financial needs of DSR operators. As it had failed to do so, it had not succeeded in dispelling the doubts that arose from the difference in treatment of generators and DSR operators in respect of the length of capacity contracts. 25. In the second place, as regards the cost recovery method, the General Court stressed that that method had to be taken into account when assessing whether the measure at issue was proportionate, as it influenced the volume of capacity that had to be procured on the capacity market and, thereby, the amount of aid. The General Court noted that the United Kingdom had amended that method during the administrative procedure, (7) and that the Commission should have examined whether that method, as amended, provided an incentive equivalent to that provided for by the method initially proposed to reduce electricity consumption during demand peaks by, inter alia, resorting to DSR. The Commission’s failure to do so was another indication of the existence of doubts. 26. In the third place, as regards the conditions of participation in the capacity market, the General Court noted that the Commission should have determined whether the measure at issue provided DSR operators with an adequate incentive to participate in the T‑1 auctions, which were a better route to market for those operators, given that: the volume of capacity reserved in the T‑1 auctions was limited when compared with the volume of capacity auctioned during the T‑4 auctions; the T‑1 auctions were not reserved for DSR operators; and there was no guarantee that the United Kingdom would organise a T‑1 auction if a T‑4 auction was organised. According to the General Court, the Commission should also have examined whether DSR operators had an appropriate incentive to participate in the T‑4 auctions, as (i) the measure at issue required all participants in the T‑4 auctions to be capable of responding to open-ended capacity events; (ii) that measure aligned the amount of the bid bond required from unproven DSR CMUs with that of new generating CMUs; and (iii) it set a 2 megawatt (MW) de minimis threshold for participating in the enduring auctions. 27. Fifthly, the General Court held that the fact that the measure at issue did not remunerate DSR operators for the savings of the amount of electricity lost during transmission and distribution was no indication of the existence of doubts, as paragraph 225 of the Guidelines required the aid to remunerate ‘solely the service of pure availability provided’, and not the sale of electricity. 28. The General Court concluded that there was a body of objective and consistent indications, based on (i) the length and circumstances of the pre-notification phase, and (ii) the incomplete and insufficient content of the decision at issue owing to the lack of appropriate investigation by the Commission at the preliminary examination stage, which demonstrated that the Commission had adopted that decision despite the existence of doubts. Consequently, the General Court annulled the decision at issue, without examining the second plea put forward by Tempus, alleging a failure to state reasons. IV. Proceedings before the Court of Justice and forms of order sought 29. By the present appeal, the Commission requests the Court of Justice to set aside the judgment under appeal; dismiss the action brought at first instance for the annulment of the decision at issue or, in the alternative, refer the case back to the General Court for it to rule on the second plea raised before it; and, in any event, order Tempus to pay the costs. 30. The United Kingdom Government supports the main form of order sought by the Commission and that sought in the alternative. 31. The Polish Government, which was granted leave to intervene in support of the Commission, takes the same position. 32. Tempus contends that the Court should, by way of reasoned order, dismiss as inadmissible the single ground of appeal to the extent that the Commission challenges, first, the General Court’s assessment of the characteristics of the measure at issue, of the duration of both the preliminary examination and the pre-notification phase, and of the multiplicity and origin of the so-called ‘complaints’, and, second, the General Court’s assessment of the cost recovery method. Tempus further contends that the Court should, in any event, dismiss the appeal. In the alternative, should the Court set aside the judgment under appeal, Tempus requests it to give final judgment on the second plea raised at first instance and annul the decision at issue. Finally, Tempus requests the Court to order the Commission to bear its own costs and pay those of Tempus, and order the United Kingdom to bear its own costs. 33. By way of measures of organisation of procedure, the Court invited all parties which had submitted written observations to answer a question in writing. The Commission, Tempus, the United Kingdom Government and the Polish Government replied within the time limit set by the Court. V. Analysis 34. I have come to the conclusion that, for the reasons set out below, the judgment under appeal should be set aside, and the Court should give final judgment in the matter and dismiss the action brought at first instance. Thus, I will examine below, first, the appeal (Section A), and, second, the action before the General Court (Section B). A. The appeal 1. Arguments of the parties 35. The Commission puts forward a single ground of appeal, whereby it submits that the General Court misinterpreted Article 108(2) and (3) TFEU and Article 4(2) and (3) of Regulation No 659/1999 in finding that, on completion of the preliminary examination, serious difficulties existed as to the compatibility with the internal market of the measure at issue, and that, therefore, the Commission should have initiated the formal investigation procedure. 36. That ground of appeal is divided into two parts. 37. In the first part of its single ground of appeal, which challenges paragraphs 68 to 72, 79 to 83, 85, 90 to 92, 101 to 109, and 111 of the judgment under appeal, the Commission submits that the General Court erred in defining the standard for establishing that serious difficulties exist and in taking into account certain factors as indications of such difficulties. 38. More precisely, the Commission contends that the General Court applied the wrong legal standard in holding that Tempus may establish the existence of serious difficulties simply by setting out its reasons for considering that such difficulties existed, rather than effectively prove their existence; and that, to that end, Tempus may rely on all relevant information that was or could have been available to the Commission on the date of adoption of the decision at issue. In the Commission’s view, in the context of a preliminary examination, it may rely on the information provided by the Member State concerned, rather than investigate of its own motion the circumstances of the case. Moreover, the Commission takes the view that the General Court erred in taking into account, as indications of the existence of serious difficulties, the following factors: (i) the characteristics of the measure at issue, such as its technical complexity and novelty and the amount of aid — given that those factors have in themselves no bearing on the compatibility assessment; (ii) the length of the pre-notification phase — as, under Article 4(5) of Regulation No 659/1999, the two-month period for taking a decision not to raise objections runs from the date of a complete notification, and any period that elapsed before the formal notification must be disregarded; and (iii) the number and origin of the observations submitted spontaneously by third parties — since, in the context of a preliminary examination, the Commission has an obligation to examine complaints, not spontaneous observations. Finally, the Commission challenges the General Court’s finding that, particularly in the case of a complex measure, the purpose of the pre-notification phase is not to assess the compatibility of that measure with the internal market. 39. In the second part of its single ground of appeal, the Commission submits that the General Court erred in faulting it for failing to investigate appropriately certain aspects of the UK capacity market. 40. First, the Commission challenges the General Court’s finding, in paragraphs 146, 152 and 154 to 156 of the judgment under appeal, that serious difficulties arose from the assessment of the potential role of DSR within the capacity market. The Commission argues, in particular, that, when the decision at issue was adopted, DSR technology was still immature, and that, therefore, it was not in a position to fully estimate the long-term potential of DSR operators. The Commission also argues that the United Kingdom Demand Response Association (‘UKDRA’), (8) which filed observations with it on 9 June 2014 (‘UKDRA’s submission of 9 June 2014’), criticised the measure at issue for placing DSR operators at a disadvantage vis-à-vis other capacity providers, and not for failing to accurately assess DSR potential. Furthermore, the Commission notes that the auction mechanism will provide actual data on DSR potential. Secondly, the Commission challenges the General Court’s finding that serious difficulties arose from the assessment of the discriminatory or disadvantageous treatment of DSR operators in respect of the length of the capacity contracts, the cost recovery method and the conditions of participation in the capacity market. As regards the shorter contracts granted to DSR operators, the Commission contends that, contrary to the General Court’s findings in paragraphs 181, 182, 184, 192 and 193 of the judgment under appeal, it does not need to examine the precise capital expenditure and financing of DSR operators because it is common ground that the financing needs of such operators are significantly lower than those of new capacity generators. As regards the cost recovery method, the Commission submits that the General Court erred in finding, in paragraphs 194 to 213 of the judgment under appeal, that it should have examined whether the amendment to the cost recovery method had an effect on the amount of aid. In the Commission’s view, the cost recovery method could not be taken into account for the purposes of the compatibility assessment as, according to case-law, the method of financing an aid measure is only relevant when it forms an integral part of that measure, which was not the case here. Further, the United Kingdom had explained convincingly why the method adopted was preferable to that initially proposed. As regards the conditions of participation of DSR operators in the capacity market, the Commission contends that the General Court erred in finding that there was no guarantee that the United Kingdom would procure through the T‑1 auction at least 50% of the volume reserved — as the United Kingdom had undertaken a commitment to that effect. The Commission also asks the Court to hold that the General Court should have declared inadmissible Tempus’ allegation concerning the 2 MW participation threshold because that allegation was raised not in Tempus’ application before the General Court, but in its reply. That allegation is, in any event, unfounded since, during the administrative procedure, no third party disputed the characterisation of the 2 MW threshold as low. 41. Tempus contends that the single ground of appeal is inadmissible in part and unfounded in whole. 42. Tempus submits that the first part of the first ground of appeal is unfounded in so far as it alleges an error of the General Court in the definition of the legal standard for proving the existence of serious difficulties. According to Tempus, it follows from the case-law and from the objective nature of the concept of serious difficulties that, rather than rely on the information provided in the notification, the Commission must determine the accuracy and completeness of that information. It also follows from the case-law that the Commission must, where necessary, extend its review beyond the information provided by the Member State concerned. 43. Tempus further submits that the first part of the single ground of appeal is inadmissible and, in the alternative, unfounded in so far as it alleges an error of the General Court in regarding as indications of the existence of serious difficulties the characteristics of the measure at issue, the length of the pre-notification phase, the number and origin of the observations submitted spontaneously by third parties, and the complexity of the measure at issue. It is inadmissible because, first, it raises questions of fact, and, second, it does not identify precisely the paragraphs of the judgment under appeal which are challenged. It is unfounded because the content of the observations made by third parties (rather than their number or origin), the significant length of the pre-notification phase (during which it was not possible to solve the important issues raised by the Commission), and the artificial brevity of the preliminary examination procedure (which lasted only one month, that is, half its usual duration) are indications of the existence of serious difficulties. 44. Turning to the second part of the single ground of appeal, Tempus submits that the Commission’s line of argument concerning DSR potential is unfounded. Given that the Commission was aware of the great potential of DSR, it could not rely on the immature nature of DSR technology to refrain from assessing DSR potential. 45. Moreover, Tempus contends that the Commission’s line of argument concerning the discriminatory or disadvantageous treatment of DSR operators in respect of the length of the capacity contracts, the cost recovery method and the conditions of participation of DSR operators in the capacity market, is inadmissible in part and unfounded in whole. First, as regards the length of the capacity contracts, Tempus argues that the appeal is unfounded as it challenges solely the General Court’s finding that the Commission should have examined in detail the financing needs of DSR operators, and not the other grounds on which the General Court relied in order to conclude that serous difficulties arose from the assessment of the discriminatory treatment of DSR operators in respect of the length of capacity contracts. Secondly, as regards the cost recovery method, Tempus raises the inadmissibility of the Commission’s contention that it was not required to investigate how the amendment to the cost recovery method would affect the total amount of aid, as this is a question of fact. In the alternative and in any event, Tempus submits that that contention is unfounded, given that the amended cost recovery method barely left any incentive at all for consumers to reduce their electricity consumption. Thirdly, as regards the conditions of participation of DSR operators in the capacity market, Tempus emphasises that the Commission does not challenge the General Court’s finding that the volume reserved for T‑1 auctions is limited, and that it is difficult for DSR operators to provide the significant volumes auctioned during the T‑4 auctions. Tempus also notes that the Commission should have determined that the United Kingdom’s commitment to procure at least 50% of the volume reserved for T‑1 auctions had been laid down in domestic law. Finally, Tempus points out that the 2 MW threshold for participation in the enduring auctions cannot be regarded as low. 46. The United Kingdom Government endorses the main form of order sought by the Commission and that sought in the alternative. It considers the single ground of appeal to be well founded. In particular, it agrees with the Commission that, in the present case, the length of the pre-notification phase is no indication of the existence of serious difficulties; that the Commission could rely on the information provided in the notification without carrying out its own investigation; and that the standard set by the General Court for establishing the existence of serious difficulties is manifestly too low and disregards the Commission’s margin of discretion. Moreover, the United Kingdom Government takes the view that the General Court erred in regarding as indications of the existence of serious difficulties the lack of appropriate investigation by the Commission of DSR potential, the length of the capacity contracts, the amendment to the cost recovery method, and the conditions of participation of DSR operators in the capacity market. 47. The Polish Government supports the forms of order sought by the Commission. In particular, it argues that the General Court erroneously shifted the burden of proof to the Commission in requiring it to show that there were no serious difficulties, rather than require the applicant to show that such difficulties existed. It alleges that the General Court misapplied the Guidelines in respect of the assessment of DSR potential, and erred in finding that the Commission should have investigated whether the new cost recovery method had an impact on the access to the capacity market of DSR operators. Moreover, the Polish Government supports the Commission’s request that the Court rule that Tempus’ allegation concerning the 2 MW participation threshold should have been declared inadmissible by the General Court. That allegation is, in any event, unfounded since a 2 MW threshold is, by European standards, a low one. 2. Assessment 48. Before I examine the substance of the single ground of appeal (Section (c)), I will assess below, first, the Commission’s request that the Court set aside the judgment under appeal in so far as it did not declare inadmissible Tempus’ allegation concerning the 2 MW de minimis participation threshold (Section (a)), and, second, the pleas of inadmissibility raised by Tempus in respect of the appeal (Section (b)). (a) The Commission’s request that the Court set aside the judgment under appeal in so far as it did not declare inadmissible Tempus’ allegation concerning the 2 MW de minimis participation threshold 49. The Commission, supported by the Polish Government, asks the Court to hold that the General Court should have dismissed as inadmissible Tempus’ allegation that the 2 MW de minimis participation threshold was high and a barrier to entry for DSR operators. (9) According to the Commission, that allegation was put forward not in Tempus’ application for the annulment of the decision at issue, but only in its reply. 50. In my opinion, that request should be dismissed. 51. Under Article 84(1) of the Rules of Procedure of the General Court, no new plea in law may be introduced in the course of proceedings unless it is based on matters of law or of fact which come to light in the course of the procedure. However, a plea or an argument which may be regarded as amplifying a plea put forward previously, whether directly or by implication, in the original application and which is closely connected therewith must be declared admissible. (10) In the present case, as the General Court held in paragraph 254 of the judgment under appeal, Tempus’ contention summarised in point 49 above was the mere amplification of the line of argument raised in its application at first instance concerning the discriminatory treatment of DSR operators, which should have led the Commission to initiate the formal investigation of procedure. 52. Thus, the Commission’s request summarised in point 49 above should be dismissed. (b) Admissibility of the appeal 53. Tempus raises the inadmissibility of certain arguments put forward by the Commission in support of the first and the second parts of the single ground of appeal. 54. First, Tempus contends that the first part of the single ground of appeal is inadmissible in so far as it alleges that the General Court erred in taking into account the following factors as indications of the existence of serious difficulties: the characteristics of the measure at issue, the length of the pre-notification phase, the number and origin of the observations by third parties, and the complexity of the measure at issue. According to Tempus, first, those are questions of fact, and, second, the appeal fails to identify the paragraphs of the judgment under appeal which are challenged. 55. In my opinion, that plea of inadmissibility cannot succeed. 56. In the first place, the line of argument summarised in point 54 above raises questions of law, not questions of fact. 57. The Commission’s line of argument is that certain factors cannot, in themselves and by their nature only, constitute indications of the existence of serious difficulties. According to the Commission, this is true of the characteristics of an aid measure and, in particular, of that measure’s complexity (as, according to case-law, the complexity of a measure may precisely justify a longer preliminary examination procedure, rather than automatically trigger the obligation to initiate the formal investigation procedure); of the length of the pre-notification phase (as only the duration of the preliminary examination procedure may be considered an indication of the existence of serious difficulties); and of the number and origin of third party observations (as, in the context of a preliminary examination, the Commission is obliged to examine complaints, not spontaneous observations by third parties). The question whether, in itself and by its nature only, each of those factors is relevant for the purposes of determining whether serious difficulties exist, is clearly a question of law. 58. In the second place, contrary to what Tempus argues, the appeal identifies the paragraphs of the judgment under appeal against which the line of argument summarised in point 54 above is directed. 59. The appeal refers to: ‘paragraphs 79 et seq.’, in relation to the argument that the characteristics of an aid measure cannot be considered an indication of the existence of serious difficulties; paragraphs 85, 92, 106, 109 and 111, in relation to the relevance of length of the pre-notification phase; and ‘paragraphs 101 to 109 (… in particular, paragraphs 108, 109 and 111)’, in relation to the relevance of the number and origin of observations by third parties. Therefore, the appeal meets the requirements of Article 169(2) of the Rules of Procedure of the Court of Justice, pursuant to which the pleas in law and legal arguments relied on shall identify precisely those points in the grounds of the decision of the General Court which are contested. 60. Even if it were considered, in particular as regards the argument concerning the characteristics of an aid measure, that the appeal does not identify precisely the paragraphs of the judgment under appeal which are being challenged, the Commission’s line of argument appears overall to be sufficiently clear for the purposes of identifying the passages of the judgment under appeal which are being challenged (namely, paragraphs 79 and 111 to 115, in which the General Court found that the measure at issue is significant, complex and novel, and that those characteristics are capable of establishing the existence of serious difficulties). (11) 61. Secondly, Tempus raises the inadmissibility of the second part of the first ground of appeal in so far as it is directed against paragraphs 208 to 212 of the judgment under appeal – that is, in so far as it alleges that the General Court erred in finding that the Commission should have investigated whether the amendment to the cost recovery method maintained an equivalent incentive to reduce electricity consumption, and whether it affected the amount of aid. In Tempus’ view, the Commission thereby requests the Court of Justice to conduct a new assessment of the facts. 62. In my opinion, that plea of admissibility must be rejected. Should the amended cost recovery method not sufficiently incentivise consumers to reduce their electricity consumption during demand peaks by, inter alia, resorting to DSR, this would call in question the proportionality of the measure at issue. That is a question of law. 63. I conclude that the single ground of appeal is wholly admissible. (c) Substance 64. The Commission puts forward a single ground of appeal, whereby it submits that the General Court misinterpreted Article 108(2) and (3) TFEU and Article 4(2) and (3) of Regulation No 659/1999 in finding that the Commission could not declare the measure at issue compatible with the internal market without initiating the formal investigation procedure. Before I turn to the assessment of the two parts of that single ground of appeal, I would like to make some preliminary observations. (1) Preliminary observations 65. I would recall that, according to the Court’s case-law, in the context of the procedure for reviewing State aid provided for in Article 108 TFEU, the preliminary stage of the procedure for reviewing aid under Article 108(3) TFEU, which is intended merely to allow the Commission to form a prima facie opinion on the partial or complete conformity of the aid in question, must be distinguished from the examination stage under Article 108(2) TFEU, which is designed to enable the Commission to be fully informed of all the facts of the case. (12) 66. That second stage is optional. However, according to case-law, the Commission may confine itself to the preliminary investigation under Article 108(3) TFEU when taking a decision in favour of aid only if it is able to satisfy itself, after an initial examination, that that aid is compatible with the internal market. If, by contrast, the initial examination leads the Commission to the opposite conclusion or even if it does not enable it to resolve all the difficulties involved in determining whether the aid is compatible with the internal market, the Commission is under a duty to initiate the procedure under Article 108(2) TFEU. (13) 67. As mentioned in points 3 and 4 above, in the present case, the Commission, having conducted a preliminary examination of the compatibility with the internal market of the measure at issue, decided, on the basis of Article 4(3) of Regulation No 659/1999, not to raise objections to that measure, as the assessment of its compatibility with the internal market did not give rise to serious difficulties. By the judgment under appeal, the General Court set aside the decision at issue, on the ground that such difficulties existed and that, therefore, the Commission could not declare the measure at issue compatible with the internal market without initiating the formal investigation procedure under Article 108(2) TFEU. Before the Court, the Commission contends that it was not confronted with serious difficulties, while Tempus submits that it was. 68. It is settled case-law that, as the criterion of serious difficulties is objective in nature, the existence of such difficulties must be looked for not only in the circumstances in which the Commission’s decision was adopted after the preliminary investigation but also in the assessments upon which the Commission relied. It follows that the lawfulness of a decision not to raise objections, based on Article 4(3) of Regulation No 659/1999, depends on the question of whether the assessment of the information and evidence which the Commission had at its disposal during the preliminary investigation phase of the measure notified should objectively have raised doubts as to the compatibility of that measure with the internal market. (14) 69. Further, where an applicant seeks the annulment of a decision not to raise objections, he must prove the existence of doubts as to the aid’s compatibility. That proof may be furnished by reference to a body of consistent evidence: the question whether or not a doubt exists requires investigation of both the circumstances in which the decision not to raise objections was adopted and its content, comparing the assessments upon which the Commission relied in that decision with the information available to it when it ruled on the compatibility of the aid in question with the internal market. (15) 70. In the present case, the General Court considered the following factors to be indications of the existence of serious difficulties: first, the length of the discussions between the United Kingdom and the Commission (including the pre-notification phase), and the circumstances surrounding the adoption of the decision at issue (requests for information sent to the United Kingdom, national public consultation organised in relation to the measure at issue, and observations filed by three different types of operators); and, second, the lack of appropriate investigation, by the Commission, of, inter alia, the role of DSR within the capacity market, the length of the capacity contracts offered to DSR operators, the amendment to the cost recovery method, and certain conditions of participation of DSR operators in the capacity market. In accordance with the case-law cited in point 69 above, the first set of factors relates to the circumstances in which the decision at issue was adopted, (16) while the second set concerns the content of that decision. (17) 71. The question before the Court is whether or not those factors are sufficient to establish the existence of serious difficulties. The first part of the single ground of appeal challenges, in essence, the factors relating to the circumstances in which the decision at issue was adopted, while the second part of that ground of appeal challenges the factors relating to the content of that decision. 72. I should point out, in that regard, that, while the Commission may, during the preliminary examination, engage in a dialogue with the Member State concerned or with third parties in an endeavour to overcome any difficulties encountered, (18) it is, however, only in connection with the formal investigation procedure that the FEU Treaty imposes on the Commission an obligation to give interested parties notice to submit comments. (19) Thus, Tempus’ line of argument is that, had the Commission initiated the formal investigation procedure, it would have been given the opportunity to submit comments and thereby cause the Commission to alter its assessment of the capacity market by giving due consideration to the role played by DSR operators. 73. Finally, I note that the case-law refers either to the existence of ‘doubts’ (20) – the term used by Regulation No 659/1999 and Council Regulation (EU) 2015/1589 (21) – or to that of ‘serious difficulties’ (22) – the term initially used by the Court. (23) The Court appears to use those two terms without distinction and to give them the same meaning. In particular, no indication may be inferred from the use of the former or the latter term as to the standard of proof that applies for establishing that the formal investigation procedure must be initiated (as the same case-law is cited in all judgments, irrespective of the term used in the particular case). I propose to use the term ‘serious difficulties’ as that term is used somewhat more frequently by the Court. (2) The first part of the single ground of appeal 74. In the first part of its single ground of appeal, the Commission contends that the General Court set an erroneously low standard for establishing that serious difficulties arise from the assessment of the compatibility with the internal market of an aid measure, and that it was wrong to rely on certain factors as indications of the existence of such difficulties. The first part of the single ground of appeal is divided into five complaints. By the first complaint, the Commission submits that the General Court erred in holding that, in the context of a preliminary examination, the Commission must take into account not only the information that was made available by the Member State concerned, but also all the relevant information that could be available upon investigation, and that, consequently, Tempus may rely also on the latter type of information for the purposes of showing that serious difficulties existed on completion of the preliminary examination. In so doing, the General Court applied, in the Commission’s view, an erroneously low standard (‘the first complaint’). By the second, third and fourth complaints, the Commission contends that the General Court erred in taking into account, as indications of the existence of serious difficulties: the characteristics of the measure at issue, such as the novelty and complexity of that measure (‘the second complaint’); the length of the pre-notification phase (‘the third complaint’); and the number and origin of the observations made by third parties (‘the fourth complaint’). Finally, the Commission challenges the General Court’s finding that, in particular in the case of a complex aid measure, the purpose of the pre-notification phase is not to assess the compatibility of that measure with the internal market (such compatibility assessment justifying, in the Commission’s view, a longer pre-notification phase) (‘the fifth complaint’). 75. I will examine below, first, the first complaint; then, the fourth complaint (as it is related to the first complaint); then, the third complaint; and, finally, the second and the fifth complaints, taken together (as they both concern the complexity of the measure at issue, and they must be examined in the light of factors put forward for the assessment of the third complaint). All those complaints should, in my opinion, be upheld. (i) Whether, in order to show that serious difficulties existed, Tempus may rely on all the relevant information that was or could have been available to the Commission on the date of adoption of the decision at issue 76. By the first complaint, which is directed at paragraphs 68 to 72 of the judgment under appeal, the Commission submits, in essence, that, in the context of a preliminary examination, it may generally confine itself to taking into account the information provided by the Member State concerned, without being required to investigate of its own motion the circumstances of the case. In particular, where third parties (such as UKDRA) (24) submit spontaneous observations, it is not required to investigate the matters put forward, without substantiation, by those parties. Thus, in the Commission’s view, the General Court erred in holding that, in the context of a preliminary investigation, the Commission must take into account not only the information that was made available to it by the Member State concerned, but also the information that (upon investigation) could have been available to it on the date when it adopted the decision at issue. According to the Commission, it follows that, for the purposes of establishing that the formal investigation procedure should have been initiated, Tempus cannot rely on any information that could have been available to the Commission on the date when it adopted the decision at issue. In particular, the fact that third parties submitted observations critical of the measure at issue does not prove that, on completion of the preliminary examination, serious difficulties arose from the assessment of the compatibility with the internal market of the measure at issue. Thus, the Commission is of the opinion that the standard thereby set by the General Court for proving that serious difficulties exist is too low. 77. The United Kingdom Government and the Polish Government concur with the Commission, while Tempus takes the opposite view. 78. I propose to uphold the first complaint. 79. In a nutshell, I consider that the General Court erred in finding, in paragraphs 68 to 72 of the judgment under appeal, that, in order to show that serious difficulties existed on completion of the preliminary examination, Tempus could rely not only on the information provided by the United Kingdom, but also on all relevant information that could have been available to the Commission upon investigation. The General Court’s approach amounts to imposing on the Commission an obligation to investigate, of its own motion, unsubstantiated matters raised by UKDRA. In my view, the Commission is under no such obligation. I will set out in detail below the reasons why I have come to that conclusion. 80. According to case-law, the Commission is required, in the interests of sound administration of the fundamental rules of the FEU Treaty relating to State aid, to conduct a diligent and impartial examination of the contested measures, so that it has at its disposal, when adopting the final decision, the most complete and reliable information possible for that purpose. (25) While that finding was made in relation to decisions taken at the end of a formal investigation procedure, it should, in my view, also apply to decisions not to raise objections to an aid measure, such as the decision at issue. Although the examination of a measure may not be as thorough in the context of a preliminary examination as it is under the formal investigation procedure, I fail to see how the Commission could not be required to conduct a diligent and impartial examination also in the former case. (26) 81. It seems to me that, in the context of a preliminary examination, the Commission fulfils its obligation to carry out a diligent and impartial examination of a measure by examining all the facts and points of law brought to its attention by the Member State concerned, without being required to investigate of its own motion the circumstances of the case. I will set out below the reasons for my position. 82. First, this follows from the nature of the preliminary examination, which, as mentioned in point 65 above, is intended not to enable the Commission to be fully informed of all the facts of the case, but merely to allow it to form a prima facie opinion. This is also consistent with the case-law of the General Court, according to which, under the preliminary examination procedure, the Commission may generally confine itself to taking into account the information provided by the Member State at issue — if necessary, following an additional request from the Commission. (27) 83. It is true that, as Tempus argues, it cannot be excluded that the Member State concerned provides incomplete, inaccurate or misleading information. However, in that case, the Commission must exercise its power under Article 5 of Regulation No 659/1999 to request additional information from that Member State. I should note that, according to the judgment cited in point 82 above, it is ‘if necessary, following an additional request from the Commission’ that the latter may confine itself to examining the information provided by the Member State concerned. In that regard, the General Court has also ruled that, even though a Member State must, in accordance with the duty of sincere cooperation laid down in Article 4(3) TEU, cooperate with the Commission by providing it with the information that will allow the Commission to take a decision on whether the measure at issue involves State aid, the fact remains that the Commission is required to carry out a careful examination of the information which the Member State provides to the Commission. (28) 84. Secondly, I should emphasise that, although the Commission is required to carry out a diligent and impartial examination of any complaint, (29) it is not, in the context of a preliminary examination, required to conduct a similar examination of any observations spontaneously made by third parties. As mentioned in point 72 above and as follows from Article 6(1) and Article 20(1) of Regulation No 659/1999, it is only in connection with the formal investigation procedure that interested parties (30) have a right to submit comments (also framed as a right to be involved in the administrative procedure). (31) 85. Thirdly, according to the case-law of the General Court, acomplaint is not to be made that the Commission failed to take into account matters of fact or of law which could have been submitted to it during the administrative procedure but which were not, since the Commission is under no obligation to consider, of its own motion and on the basis of prediction, what information might have been submitted to it. (32) While that finding was made almost exclusively (33) in cases concerning decisions taken at the end of a formal investigation procedure, it should, in my opinion, apply all the more to decisions not to raise objections, such as the decision at issue. If the Commission is not required to investigate a case of its own motion under the formal investigation procedure, there is no reason why it should be required to do so in the context of a preliminary examination, which, again, is intended merely to allow it to form a prima facie opinion. 86. Further, in the judgment cited in point 82 above, the General Court held not only that, in the context of a preliminary examination procedure, the Commission may generally confine itself to taking into account the information provided by the Member State concerned, but also that it is not required to conduct on its own initiative preparatory inquiries into all the circumstances of the case if the information provided by the notifying Member State enables it to satisfy itself that the measure in question either does not constitute aid or, if it is classified as aid, is compatible with the internal market. 87. However, I should note that the limits placed by the case-law of the General Court cited in point 86 above on the Commission’s obligation to carry out a diligent and impartial examination of an aid measure are at odds with the judgment of 2 April 1998, Commission v Sytraval and Brink’s France (‘the judgment in Sytraval’), (34) which concerns the Commission’s obligation to examine not an aid measure, but a complaint. In that judgment, the Court held, in paragraph 62, that the Commission was obliged, where necessary, to extend its investigation of a complaint beyond a mere examination of the facts and points of law brought to its notice by the complainant and to examine matters not expressly raised by the complainant. The question thus arises as to whether paragraph 62 of the judgment in Sytraval should be extended to the present case. 88. I consider that it should not. 89. This is because recognition of an obligation on the Commission to go beyond the mere examination of the facts and points of law spontaneously brought to its attention by a third party would imply recognition of an obligation on the Commission to examine the observations made by interested parties. However, as mentioned in point 84 above, it is only in connection with the formal investigation procedure that the Commission is under such an obligation. Therefore, as the Commission contends, were the Court’s finding in paragraph 62 in the judgment in Sytraval to be extended to the examination of observations spontaneously submitted under a preliminary examination, this would blur the distinction between the two phases of the procedure for reviewing State aid. 90. This is also because the rationale for the Commission’s obligation to examine complaints and, where necessary, go beyond the examination of the facts and points of law put forward by the complainant is that, in the case of unlawful aid, it has little information at its disposal, given that it receives none from the Member State concerned, and that complainants typically have limited access to relevant information. That rationale is, however, lacking in the case of notified aid. While, as mentioned in point 83 above, the information submitted by the Member State concerned may be incomplete or incorrect, this cannot be compared to the situation in which that Member State fails to notify an aid measure. 91. Finally, this is because Regulation No 734/2013 amended Article 20(2) of Regulation No 659/1999 to the effect that complaints must now comply with a compulsory form, (35) which requires complainants to provide information concerning, inter alia, the features of the alleged aid measure, the grounds of complaint and the compatibility with the internal market of that measure. It follows from the second subparagraph of Article 10(1) of Regulation No 659/1999, as amended by Regulation No 734/2013, that the Commission is only obliged to examine complaints that are submitted by using the complaint form (and that are made by an interested party). (36) Pursuant to recital 14 of Regulation No 734/2013, ‘[s]ubmissions not meeting [those two conditions] should be treated as general market information, and should not necessarily lead to ex officio investigations.’ Thus, recognition of an obligation on the Commission to go beyond the examination of the facts and points of law brought to its attention by a third party by means of the spontaneous submission of observations would allow interested parties to circumvent the obligation to comply with the complaint form, and thereby undermine the amendments introduced by Regulation No 734/2013. 92. Consequently, in my view, paragraph 62 of the judgment in Sytraval should not be extended to the present case. It follows that, in the context of a preliminary investigation, the Commission may generally rely solely on the information provided by the Member State concerned, without being required to investigate the case of its own motion. 93. I should, however, mention that it follows from the case-law cited in point 80 above that the Commission’s final decision must, to the extent possible, be based on complete and reliable information. Therefore, the Commission may rely solely on the information provided by the Member State concerned only where that information is complete and reliable. Thus, it seems to me that, where, in the context of a preliminary examination, a third party adduces evidence that calls into question the completeness and reliability of the information provided by the Member State concerned, the Commission should not be permitted to ignore that evidence. Rather, as the United Kingdom Government argues, the Commission must take that evidence into account. (37) I should note that, in the present case, the Commission examined (38) the observations spontaneously submitted by UKDRA, a provider of balancing services and the acquirer of existing power plants, gave the United Kingdom the opportunity to submit comments on those observations, (39) and addressed the content of those observations in the decision at issue. (40) 94. My proposal in point 93 above does not amount to conferring on third parties a right to submit observations in the context of a preliminary examination procedure, given that the Commission should not be considered to be required to take into account the evidence provided by third parties in all cases, but only where it takes the view that that evidence calls into question the completeness and reliability of the information provided by the Member State concerned. 95. I should also emphasise that, in my view, it is only where a third party adduces sound evidence in support of its allegations that the Commission must take those allegations into account – and that, consequently, it is under no obligation to go beyond the facts and points of law brought to its attention by that party. 96. I conclude that, in the context of a preliminary investigation, the Commission may generally confine itself to relying on the information provided by the Member State concerned, unless a third party adduces evidence that, in the Commission’s view, calls into question that information. (41) However, in the latter case, the Commission is simply obliged to take that evidence into account, not to go beyond the examination of the facts and points of law brought to its attention by the third party. 97. In the present case, in paragraphs 70 to 72 of the judgment under appeal, the General Court held, in essence, that the Commission is required to research and examine, thoroughly and impartially, all relevant information that was or could have been available to it on the date when it adopted the decision at issue. 98. I agree with the General Court that the Commission is required to examine, thoroughly and impartially, all relevant information that was available to it on that date, that is, all relevant information that was provided to it during the administrative procedure by the Member State concerned or by any complainants. However, it seems to me that the General Court erred in holding that the Commission was required to research, thoroughly and impartially, all relevant information that could have been available to it on the date when it adopted the decision at issue. This is because it follows from point 96 above that (apart from the case of a complaint brought in accordance with Article 20(2) of Regulation No 659/1999, as amended by Regulation No 734/2013) the Commission is obliged to investigate a case of its own motion only where a third party adduces evidence that the Commission considers calls into question the information provided by the Member State concerned. It follows that the General Court erred in finding that, in order to establish the existence of serious difficulties, Tempus could rely on all relevant information that could have been available to the Commission on the date when it adopted the decision at issue. 99. It also follows that the General Court erred in holding, in paragraph 68 of the judgment under appeal, that it is sufficient that Tempus sets out its reasons for concluding that serious difficulties existed on completion of the preliminary examination. For the reason set out in point 95 above, Tempus must also provide sound evidence that calls into question the information provided by the United Kingdom. 100. I therefore conclude that the first complaint should be upheld. (ii) Whether the number and origin of observations spontaneously made by third parties may be taken into account as an indication of the existence of serious difficulties 101. By the fourth complaint, which is directed at paragraphs 101 to 109 and 111 of the judgment under appeal, the Commission contends that the General Court erred in taking into account the number and origin of the observations spontaneously submitted by third parties as an indication that serious difficulties existed. 102. It is apparent from paragraph 109 of the judgment under appeal that the General Court regarded the number and origin of third party observations as a factor to be balanced against the brevity of the preliminary examination procedure, such brevity being, in the General Court’s view, an indication that no serious difficulties existed. I should emphasise that, in that paragraph, the General Court made no reference whatsoever to the substance of those observations. It is their number (their ‘multiplicity’) and their origin (the fact that they were submitted ‘by three different types of operators’, namely UKDRA, a provider of balancing services, and the acquirer of existing power plants) that caused the General Court to consider them to be indications of the existence of serious difficulties. 103. However, it does not follow from the provisions of Regulation No 659/1999 that the formal investigation procedure must automatically be initiated upon the submission of observations by third parties, given that interested parties do not have a right to submit observations at the preliminary examination stage. Nor does this follow from the case-law cited in point 86 above, according to which, at that stage, the Commission may generally confine itself to taking into account the information provided by the Member State concerned; or from point 96 of this Opinion, according to which it is only if evidence is adduced in support of third party observations that the Commission must take them into account and, as the case may be, initiate the formal investigation procedure. 104. Thus, in my view, the fourth complaint must be upheld. (iii) Whether the length of the pre-notification phase may be taken into account as an indication of the existence of serious difficulties 105. According to case-law, the length of the preliminary examination procedure can constitute an indication that the Commission may have had doubts regarding the compatibility of the aid at issue with the internal market. (42) Pursuant to Article 4(5) of Regulation No 659/1999, a decision not to raise objections shall be taken within two months of the receipt of a complete notification. In the present case, the preliminary examination lasted exactly a month, as the measure at issue was notified on 23 June 2014 (43) and the decision at issue was adopted on 23 July 2014. Thus, the time period set out in Article 4(5) of Regulation No 659/1999 was respected. 106. However, pre-notification contacts took place between the United Kingdom and the Commission and lasted approximately 18 months, as the United Kingdom informed the Commission of the content of the planned measure in December 2012 (44) and the measure at issue was notified on 23 June 2014. 107. Therefore, in paragraph 85 of the judgment under appeal, the General Court held that the fact that the preliminary examination lasted only a month was not a reliable indication that serious difficulties had not arisen on completion of that examination, and that the length of the pre-notification phase had also to be taken into account. It then found, in paragraphs 92 and 106, that that phase had been significantly longer than the two-month period envisaged in paragraph 14 of the Best Practices Code. It concluded, in paragraphs 109 and 111, that the length of the ‘discussions between the Member State and the Commission’ (that is, the length of the preliminary examination procedure and of the pre-notification phase, taken together) was an indication of the existence of serious difficulties. 108. By the third complaint, which is directed at paragraphs 85, 92, 106, 109 and 111 of the judgment under appeal, the Commission contends that the General Court erred in holding that, in the circumstances of the present case, the length of the pre-notification phase was to be taken into account. The United Kingdom Government and the Polish Government agree with the Commission. Tempus takes the opposite view, and argues that the Commission committed an abuse of process by forming a prima facie opinion on the conformity of the measure at issue at the end of the pre-notification phase, although, first, it did not yet have all the necessary information at its disposal, (45) and, second, particularly in complex cases such as the present one, the Commission’s prima facie opinion should be formed at the end of the preliminary examination procedure, not at the end of the pre-notification phase. 109. I consider that the third complaint must be upheld. 110. I note that Article 4(5) of Regulation No 659/1999 states that the two-month period for adoption of a decision not to raise objections runs from the receipt of a complete notification. According to the same provision, a notification is considered complete if, within two months of its receipt, or from the receipt of any additional information requested, the Commission does not request any further information. Thus, the General Court has held that, where the Commission requests additional information, the two-month period provided for in that provision runs not from the receipt of the (incomplete) notification, but from the receipt of the response to the last information requested. (46) The General Court has also held that, in the case of pre-notifications contacts between the Member State concerned and the Commission, that two-month period runs not from such contacts, but from the receipt of the formal notification. (47) 111. This is because the purpose of the pre-notification phase is precisely to allow the Member State concerned to complete its notification by providing additional information upon request by the Commission (or on its own initiative), and, as the case may be, to make amendments to the notification. 112. Thus, I take the view that no account may be taken, for the purposes of determining whether the length of the review procedure is an indication of the existence of serious difficulties, of the pre-notification phase. It follows that the General Court erred in holding, in paragraph 109 of the judgment under appeal, that, notwithstanding the brevity of the preliminary examination procedure, the length of the pre-notification phase was an indication of the existence of serious difficulties. 113. Therefore, the third complaint must be upheld. (iv) Whether the complexity and novelty of the measure at issue may be taken into account as an indication of the existence of serious difficulties 114. By the second complaint, which challenges paragraphs 79 to 83 of the judgment under appeal, the Commission submits that the General Court erred in taking into account, as indications of the existence of serious difficulties, the characteristics of the measure at issue, such as the complexity and the novelty of that measure and the amount of aid granted. In the Commission’s view, those factors have, in themselves, no bearing on the compatibility assessment. Rather, the complexity and novelty of an aid measure justify a longer preliminary examination. 115. In my view, the second complaint should be upheld. 116. According to case-law, although the length of the preliminary examination procedure can constitute an indication of the existence of serious difficulties, it cannot of itself lead to the conclusion that the Commission should have initiated the formal investigation procedure. Whether or not the duration of a procedure for the preliminary examination is reasonable must be determined in relation to the particular circumstances of each case, especially its context, the various procedural stages to be followed by the Commission, the complexity of the case and its importance for the various parties involved. (48) Thus, as the Commission argues, the complexity of a case may justify a longer preliminary examination. 117. I would add that the General Court has held that the complexity of a case does not necessarily require the initiation of a formal investigation procedure (as it is conceivable that, during the preliminary examination, the Commission overcomes the difficulties encountered). (49) 118. Therefore, in my opinion, the General Court erred in considering, in paragraphs 78 and 81 of the judgment under appeal, the complexity of the measure at issue to be an indication of the existence of serious difficulties. 119. By the fifth complaint, which is directed at paragraphs 86 to 91 of the judgment under appeal, the Commission contends, in essence, that the General Court erred in finding that, particularly in the case of a complex measure, the purpose of the pre-notification phase is not to assess the compatibility of that measure, but to reduce the risk that the notification is found to be incomplete when formally submitted. In the Commission’s view, such a compatibility assessment justifies a longer pre-notification phase. 120. In my opinion, while there can be no dispute that, at the end of the pre-notification phase, the Commission should not have formed a prima facie opinion on the compatibility with the internal market of the measure in question (as that is the purpose of the preliminary examination), it cannot, however, be expected to refrain from any assessment of that compatibility, albeit provisional and superficial, during the pre-notification phase. This is because, should it not conduct such preliminary assessment during that phase, it would not be able to determine which information is still needed for the notification to be considered complete, or whether amendments should be made to the notified measure. 121. This applies also in the case of a complex measure. The reasons set out in points 116 and 117 above justify not only a longer preliminary examination, but also a longer pre-notification phase. I should also note that it does not follow from paragraph 16 of the Best Practices Code that, unlike in other cases, in novel and complex cases, the Commission does not conduct a preliminary assessment of the measure in question during the pre-notification phase. Rather, that provision merely states that, in novel and complex cases, the Commission does not ‘provide the Member State concerned with [such an] assessment’. 122. I conclude that the second and the fifth complaints must be upheld. Thus, the first part of the single ground of appeal must be upheld in its entirety. (3) The second part of the single ground of appeal 123. As mentioned in point 71 above, in the second part of its single ground of appeal, the Commission contends that the General Court erred in finding that serious difficulties arose from the lack of appropriate investigation of, first, the potential role of DSR within the capacity market and, second, the alleged discriminatory treatment of DSR operators vis-à-vis other capacity providers in respect of the length of capacity contracts, the amendment to the cost recovery method, and certain conditions of participation in the capacity market. I will examine in turn each of these complaints, all of which are, in my opinion, well founded. (i) Whether the Commission should have investigated the potential role of DSR operators within the capacity market 124. The decision at issue does not contain any estimates for the role that DSR operators could play in the capacity market. In particular, that decision makes no reference to NG’s estimate, which the United Kingdom quoted in its notification, according to which DSR could provide around 3 gigawatt (GW) of capacity in 2018/2019. There is no indication that the Commission, though being aware of the lack of comprehensive data on DSR potential, (50) carried out its own examination of such potential. Rather, it accepted the modalities envisaged by the United Kingdom for assessing such potential, namely: that information would be revealed through the first T‑4 auction in December 2014; that a joint study would be conducted by NG and another entity concerning the current and potential DSR capacity; and that transitional auctions would be held in 2015 and 2016 to support the growth of DSR. (51) 125. As mentioned in point 22 above, in paragraph 158 of the judgment under appeal, the General Court found that the Commission’s lack of examination of the potential role of DSR within the capacity market was an indication of the existence of serious difficulties. 126. Before the Court, the Commission, supported by the United Kingdom Government and the Polish Government, contends that it was not required to investigate the potential role of DSR, while Tempus takes the opposite view. 127. In my view, the General Court erred in considering the Commission’s lack of investigation of DSR potential to be an indication of the existence of serious difficulties. 128. In that regard, I note that the Commission did not rely on the information contained in the notification (given that, as mentioned in point 124 above, the decision at issue makes no reference to NG’s estimate for DSR potential). It did, however, accept the United Kingdom Government’s view that it was sufficient that such potential be assessed after the adoption of the decision at issue, through the first T‑4 auction and future studies. The question is whether the Commission could accept those modalities, or whether it was required to carry out its own assessment of DSR potential. 129. No obligation to investigate may arise, in that respect, from the submission of a complaint – (52) as none was lodged – or from the observations of third parties – (53) as UKDRA’s submission of 9 June 2014 does not address the matter of the amount of DSR potential, let alone provide any evidence, such as alternative estimates. Thus, it is only if the information provided in the notification and in response to the Commission’s requests is to be considered incomplete that the Commission may be under an obligation to investigate. (54) 130. It seems to me that, in the present case, the Commission was under no such obligation. 131. Reference should be made to the Commission’s assertion that, because DSR technology was still immature at the time the decision at issue was adopted, it was not in a position to estimate DSR potential– whose long-term importance it does not dispute in its written pleadings. (55) Reference should also be made to the PTE’s Report, which points at the lack of information on DSR potential and at the difficulty of gathering such information. According to the PTE, this is due, inter alia, to the variety of the resources that should be taken into account when appreciating the demand side, and to the lack of an over-arching organisation collecting and analysing demand side data. (56) Further, I note that Tempus does not appear to dispute the Commission’s assertion that it is difficult to gather reliable information on DSR potential. 132. I should also mention that ‘very different estimates’ for DSR potential were provided by interested parties and the United Kingdom in the context of the formal investigation procedure which the Commission initiated for the implementation of the judgment under appeal. (57) While the lawfulness of the decision at issue cannot be assessed in the light of such estimates as there is no indication that they were available to the Commission when it adopted that decision, I should nonetheless note that the discrepancy between those estimates is further evidence of the difficulty of gathering reliable information on DSR potential. 133. It seems to me that, given the difficulty of gathering reliable information, the Commission cannot be faulted for failing to carry out its own investigation of DSR potential. 134. This is all the more true given that, as the Commission contends, the corrective mechanism embodied in T‑1 auctions should ensure that DSR capacity be granted a role that reflects its full potential. Should generation capacity be granted a larger role than is strictly necessary in the first T‑4 auction, the T‑1 auction, which is a better route for DSR operators to access the capacity market, should allow those operators to increase their participation in that market. 135. I therefore conclude that the General Court erred in holding, in paragraph 158 of the judgment under appeal, that the Commission’s lack of examination of the potential role of DSR within the capacity market was an indication of the existence of serious difficulties. (ii) Whether there was sufficient examination of the discriminatory or disadvantageous treatment of DSR operators in respect of the length of capacity contracts 136. As the General Court held in paragraphs 165 to 168 of the judgment under appeal, DSR operators cannot be granted contracts of longer than a year, whereas generators may be granted contracts of up to 3 years (if they undertake capital expenditure above GB 125/kW, that is, where they refurbish a plant) or up to 15 years (if they undertake capital expenditure above GBP 250/kW, that is, where they build a new plant). It is indeed apparent from Regulation 11(3) of the Electricity Capacity Regulations 2014 that those thresholds apply only to generators (and that DSR operators are ineligible to be issued contracts of up to 3 or 15 years even if they undertake capital expenditure in excess of said thresholds). 137. As mentioned in point 24 above, in paragraph 193 of the judgment under appeal, the General Court held that, given that the reason for granting capacity contracts of longer than a year was to mitigate the financing difficulties of new and refurbishing generators, due to the size of their capital expenditure, by guaranteeing them an income over a number of years, the Commission should have examined whether the capital expenditure and financial needs of DSR operators required that they also obtained contracts of longer than a year. UKDRA’s submission of 9 June 2014 had drawn the Commission’s attention to that matter. It was not for UKDRA to provide more detailed information in that regard, but for the Commission to inform itself further on the matter. Thus, according to the General Court, the Commission’s lack of investigation of the financial needs of DSR operators was an indication of the existence of serious difficulties. 138. The Commission, supported by the United Kingdom Government, (58) contends that it was not required to examine the capital expenditure and financial needs of DSR operators before it could rule out any infringement of the principle of equal treatment between DSR operators and generators in relation to the length of capacity contracts. This was because, in particular, it was not disputed that DSR operators have significantly lower financial needs than capacity providers engaged in refurbishing existing plants or in building new ones. Tempus submits that the Commission’s plea should be dismissed. 139. I consider that the General Court erred in finding, in paragraph 193 of the judgment under appeal, that the Commission’s lack of examination of the capital expenditure and financial needs of DSR operators was an indication of the existence of serious difficulties. 140. I note that Tempus does not dispute that DSR operators have lower capital expenditure and financial needs than new or refurbishing generators. 141. I also note that UKDRA simply stated, in its submission of 9 June 2014, that DSR operators were offered one-year contracts while generators could be granted contracts of up to 15 years; and that such a limitation on the length of the contracts offered to DSR operators placed those operators at a competitive disadvantage, failed to provide them with adequate incentives to participate in the capacity market, and ran counter to the Guidelines’ objective of phasing out environmentally-harmful subsidies. UKDRA’s submission of 9 June 2014 makes no reference to the financial needs of either DSR operators or new or refurbishing generators, let alone compares the respective needs of those two types of capacity providers. Most importantly, during the administrative procedure, UKDRA did not put forward any evidence to support its allegations. This is all the more surprising given that, as a group of aggregators, UKDRA could likely obtain relevant information on the matter from its members, such as Tempus. 142. Thus, in the light of point 95 of this Opinion, it cannot be considered that the Commission was under an obligation to take UKDRA’s allegations into account, let alone to examine of its own motion whether the financial needs of DSR operators required that they be granted contracts of longer than a year. 143. Therefore, the General Court erred in finding, in paragraph 193 of the judgment under appeal, that the Commission’s lack of examination of the capital expenditure and financial needs of DSR operators was an indication of the existence of serious difficulties. (iii) Whether there was sufficient examination of the discriminatory or disadvantageous treatment of DSR operators in respect of the cost recovery method adopted 144. I recall that, as mentioned in point 17 above, the capacity payments made to capacity providers are financed through a charge levied on all licensed electricity suppliers. Under the measure at issue, suppliers’ charges are calculated on the basis of their market share of electricity demand registered between 16.00 and 19.00 on winter weekdays from November until February (‘the cost recovery method adopted’ or ‘the method adopted’). (59) 145. However, it was initially envisaged that the amount of the charges would be calculated on the basis of the suppliers’ market share registered during the so-called ‘triad’ periods, that is to say, the three half-hour periods registering the highest annual electricity consumption during the period from November to February (‘the method initially proposed’). Following the national public consultation organised from October to December 2013, the United Kingdom decided to amend the method initially proposed to adopt one based on consumption between 16.00 and 19.00 during winter weekdays, as described in point 144 above. According to the notification, the reason why the cost recovery method was amended is that triad peaks are identified after the event, and that, therefore, using them as a reference period for calculating the suppliers’ charge creates uncertainty for suppliers. It follows, according to the notification, that, under the method initially proposed, suppliers have an incentive to charge consumers with risk premiums that are higher than those charged under the method adopted. (60) 146. In the decision at issue, the Commission did not object to the cost recovery method adopted. It accepted the United Kingdom Government’s position that the method adopted ‘retains an incentive to reduce demand at peak times, while being predictable for suppliers’. (61) 147. However, the General Court considered, in paragraph 213 of the judgment under appeal, that the Commission should have examined whether the change to the cost recovery method had an effect on the proportionality of the measure at issue and, therefore, on that measure’s compatibility with the internal market. According to the General Court, the fact that the Commission failed to conduct such an examination and that, therefore, it did not have all the information with regard to the method adopted was an indication that serious difficulties existed on completion of the preliminary examination. 148. Before the Court, the Commission contends that it was not required to conduct that examination. The United Kingdom Government and the Polish Government concur with the Commission, while Tempus takes the opposite view. 149. I consider that the General Court erred in finding, in paragraph 213 of the judgment under appeal, that the Commission must examine whether the change to the cost recovery method described in points 144 and 145 above had an effect on the proportionality of the measure at issue. 150. According to paragraph 69 of the Guidelines, energy aid is considered to be proportionate if the aid amount per beneficiary is limited to the minimum needed to achieve the energy objective sought. (62) According to paragraphs 228 to 231 of the Guidelines, which concern the proportionality of aid for generation adequacy, the amount of aid should be calculated so as to allow beneficiaries to earn a reasonable rate of return, which is considered to be the case where a competitive bidding process is held on the basis of clear, transparent and non-discriminatory criteria, effectively targeting the defined objective. The aid measure must also have built-in mechanisms to ensure that windfall profits cannot arise, and be constructed so as to ensure that the price paid for availability automatically tends to zero when the level of capacity supplied is expected to meet the level of capacity demanded. 151. At the outset, I note that the Commission questions whether the cost recovery method – which is the method of financing the capacity payments – may be taken into account for determining whether the measure at issue is compatible with the internal market. 152. According to case-law, taxes do not fall within the scope of the provisions of the FEU Treaty relating to State aid, unless they constitute the method of financing an aid measure so that they form an integral part of that measure. For a tax to be regarded as forming an integral part of an aid measure, it must be hypothecated to the aid under the relevant national rules, in the sense that the revenue from the tax is necessarily allocated to the financing of the aid and has a direct impact on the amount of the aid and, consequently, on the assessment of the compatibility of that aid with the internal market. (63) 153. For instance, a tax on pay-television operators was considered to not form an integral part of the aid granted to RTVE, the Spanish radio and television broadcasting organisation which had been entrusted with a public service mandate in those fields, given that the amount of aid was determined on the basis of the net costs relating to the fulfilment of RTVE’s public service mandate. The revenue from the tax had no direct impact on the amount of aid as: (i) any tax revenues that exceeded the costs of fulfilling RTVE’s public service mandate were reassigned, as appropriate, to a reserve fund or the treasury; and (ii) conversely, where the tax revenue was insufficient to cover those costs, the Spanish State was required to make up the difference. (64) 154. By contrast, a charge on advertising companies was considered to form an integral part of the French radio broadcasting aid scheme which it was intended to finance, because: (i) the net revenue from that charge was used wholly and exclusively to finance the radio broadcasting aid, given that the body responsible for allocating the aid did not have the power to allocate the funds available for purposes other than that of such aid; and (ii) the amount of aid had to be determined essentially within the limits of the anticipated revenue from the charge on advertising companies. (65) 155. I recall that, in the present case, the capacity payments are financed by the suppliers’ charge. (66) That charge is paid by all licensed suppliers of electricity to a body owned and set up by the United Kingdom Government to, inter alia, control the payments disbursed under capacity agreements, namely the Settlement Body, which in turn pays capacity payments to providers. (67) 156. On the one hand, I note that the Commission argues, in support of its position that the suppliers’ charge does not form an integral part of the measure at issue, that it is the amount of aid that determines the amount of the suppliers’ charge, and not vice-versa. In its view, this is because the amount of the suppliers’ charge is calculated once the amount of the capacity payments is known, so as to meet the costs incurred by those payments. 157. On the other hand, I should mention, in support of Tempus’ view that the suppliers’ charge forms an integral part of the measure at issue, that it has not been alleged before the Court that the Settlement Body has the power to allocate the revenue from the suppliers’ charge to purposes other than those of the aid, as was the case in the judgment mentioned in point 153 above – and as was not the case in the judgment mentioned in point 154 above, leading to the finding that the charge in question formed an integral part of the aid measure. I should, however, emphasise that limited information has been provided to the Court in that respect. 158. I should also mention that, according to Tempus, the United Kingdom Government itself has admitted that the cost recovery method affects the amount of aid. 159. It is true, and this was noted by the General Court in paragraph 205 of the judgment under appeal, that the United Kingdom Government acknowledged, in the notification, that the cost recovery method influences the volume of capacity auctioned. The United Kingdom Government’s line of argument, in that regard, is that the method of calculating the suppliers’ charge on the basis of the demand registered during demand peaks gives consumers a clear incentive to reduce their consumption during such peaks, which reduces the amount of capacity needing to be purchased in order to reach the desired reliability standard. As the amount of capacity purchased influences in turn the amount of aid, (68) this suggests that the cost recovery method has an impact on the amount of aid. 160. However, the United Kingdom Government’s argument holds true only if the method adopted provides adequate incentives for consumers to reduce peak demand. While the United Kingdom Government and the Commission consider that that is the case, Tempus takes the opposite view. Tempus is of the view that, by using as the reference period for calculating the suppliers’ charge the periods between 16.00 and 19.00 on all winter weekdays, rather than the sole three half-hour periods registering the highest demand peaks in winter, the method adopted blunts the price signal that should be sent to consumers to reduce demand during critical demand peaks. 161. Thus, it is uncertain whether the revenue from the suppliers’ charge has a direct impact on the amount of the aid, as the case-law cited in point 152 above requires. Were it not to have such an impact, it would follow: that the cost recovery method does not form part of the measure at issue; that the Commission was under no obligation to take that method into account for the purposes of assessing that measure’s compatibility with the internal market; and that the General Court erred in finding, in paragraph 213 of the judgment under appeal, that the Commission’s failure to examine the effect of the method adopted on the proportionality of the measure at issue was an indication of the existence of serious difficulties. 162. However, should it be the case that the revenue from the suppliers’ charge has a direct impact on the amount of aid and that, therefore, that charge forms an integral part of the measure at issue, this would have no impact on my conclusion in point 161 above that the General Court erred in regarding the Commission’s failure to examine the effect of the method adopted on the proportionality of that measure to be an indication of serious difficulties. 163. This is because, as mentioned in point 96 of this Opinion, in the context of a preliminary investigation, the Commission may generally confine itself to relying on the information provided by the Member State concerned, unless a third party adduces evidence that calls into question that information. Thus, as the United Kingdom Government had explained to it that the method adopted provided adequate incentives for consumers to reduce consumption, reduced the need for generation adequacy, and thereby kept the aid to the minimum needed, the Commission was under no obligation to further investigate the matter of its own motion. Admittedly, UKDRA’s submission of 9 June 2014 states that the method adopted resulted in the unequal treatment of DSR operators vis-à-vis generators because it provided insufficient incentives for consumers to reduce consumption at critical peak times, thereby depriving DSR operators of market opportunities, while leaving generators unaffected. (69) However, UKDRA failed to explain precisely how the capacity payments were calculated, or why they were not kept to the minimum needed. Most importantly, UKDRA did not provide any evidence in support of its allegations. In those circumstances, the Commission cannot be faulted for failing to further investigate the matter. 164. I therefore conclude that the General Court erred in holding, in paragraph 213 of the judgment under appeal, that the Commission’s failure to examine the effect of the method adopted on the proportionality of the measure at issue was an indication of the existence of serious difficulties. (iv) Whether there was sufficient examination of the discriminatory or disadvantageous treatment of DSR operators in respect of the interplay between the T‑4 and the T‑1 auctions and of some conditions of participation in the capacity market 165. I will examine in turn the claims alleging an error of law of the General Court in paragraphs 242 and 243 of the judgment under appeal (concerning the United Kingdom’s commitment to hold T‑1 auctions) and in paragraphs 256 to 258 of that judgment (concerning the 2 MW de minimis participation threshold for the enduring auctions). 166. As regards, first, the plea alleging an error of law of the General Court in paragraphs 242 and 243 of the judgment under appeal, I recall that, as mentioned in point 13 above, the United Kingdom ‘commit[ted]’ (70) to hold a T‑1 auction if a T‑4 auction was organised, and to procure in the T‑1 auction at least 50% of the volume of capacity initially reserved for that auction. Given that, due to the lead times of DSR operators, T‑1 auctions are a better route to market for those operators, the United Kingdom thereby sought to encourage their participation in the capacity market. 167. In paragraphs 242 and 243 of the judgment under appeal, the General Court found that there was ‘no guarantee’ that the United Kingdom would honour that commitment, since the Electricity Regulations 2014 had to be read as meaning that the Secretary of State could decide to not organise T‑1 auctions, and neither the Commission nor the United Kingdom Government had been able to point to the provision of national law confirming the existence of the guarantee mentioned above. This led the General Court to the conclusion that serious difficulties arose as to the size of the incentive for DSR operators to participate in the capacity market. 168. Before the Court, the Commission, supported by the United Kingdom Government, (71) contends that it was not required to identify such a provision of national law. Tempus replies that it was. 169. In my view, the General Court erred in finding that the Commission should have determined whether a provision of national law confirmed the existence of the United Kingdom’s commitment. 170. While it appears to be true that the Electricity Capacity Regulations 2014 do not oblige the Secretary of State to organise a T‑1 auction if a T‑4 auction is organised, (72) the United Kingdom’s commitment to do so is clearly set out in recital 46 of the decision at issue, which states that ‘the [United Kingdom] Government commits to procure in the year ahead auctions at least 50% of the capacity reserved four years earlier’ (73) (and thus to hold a T‑1 auction for that purpose). The United Kingdom’s commitment thus forms an integral part of the measure at issue, (74) which the decision at issue declares to be compatible with the internal market. It follows that, should the United Kingdom fail to organise a T‑1 auction when a T‑4 auction has been organised, (75) the aid granted in breach of its commitment would not be covered by the decision at issue, and it would have to be regarded as new aid granted in contravention of Article 108(3) TFEU. 171. It seems to me that, in those circumstances, the Commission could rely on the assurance given by the United Kingdom and that it was under no obligation to examine whether the United Kingdom’s commitment had been laid down in domestic law. I conclude that the General Court erred in holding, in paragraphs 242 and 243 of the judgment under appeal, that the absence of an express legal provision guaranteeing that the United Kingdom would procure at least 50% of the volume reserved for the T‑1 auctions gave rise to serious difficulties as to the size of the incentive provided to DSR operators. 172. Secondly, as regards the plea alleging an error of law in paragraphs 256 to 258 of the judgment under appeal, I should explain that generators and DSR operators may participate in the capacity market subject to certain conditions, and that one of those conditions is that their capacity must be between a 2 MW de minimis threshold and 50 MW. Capacity providers may either meet that threshold individually, or aggregate sites with other providers in order to reach the threshold. (76) Another condition is that new generators and unproven DSR operators – as opposed to proven DSR capacity providers, the declared capacity of which has been proved by the provider in a test – must submit a bid bond of GBP 5 000 per megawatt for T‑4 and T‑1 auctions. (77) 173. In paragraphs 256 to 258 of the judgment under appeal, the General Court found that the 2 MW de minimis participation threshold gave rise to serious difficulties as to whether the measure at issue provided an adequate incentive for DSR operators to participate in the capacity market. According to the General Court, that threshold was not low as stated in the notification, but significantly higher than the participation threshold for the Pennsylvania Jersey Maryland (‘PJM’) capacity market. Although DSR operators could aggregate several customer sites in order to reach the 2 MW de minimis participation threshold, they were, in that case, liable to pay the bid bond on the whole of the 2 MW, even if a tiny proportion of that volume was unproven DSR capacity. The Commission should thus have determined that the financial needs of those operators had been taken into account. However, it had failed to do so. 174. Before the Court, the Commission, supported by the United Kingdom Government and the Polish Government, submits that it had no reason to question the level of the 2 MW de minimis participation threshold, and that that threshold was, in any event, adequate. Tempus takes the opposite view. 175. In my view, the General Court erred in holding that serious difficulties arose from the assessment of the 2 MW de minimis participation threshold. 176. I agree with the United Kingdom Government and the Polish Government that the 100 kW participation threshold in the PJM capacity market cannot be used as a reference for determining whether the 2 MW de minimis participation threshold is set at a level where it does not provide an adequate incentive for DSR operators to participate in the enduring auctions. This is due to the greater role of DSR operators in capacity markets in the United States when compared with the United Kingdom, as assessed by the PTE’s Report. (78) 177. By contrast, the participation thresholds adopted by NG for balancing services, which are referred to in the notification, should be a more appropriate benchmark as they were set in respect of the United Kingdom. Those thresholds are above 2 MW. It seems to me that, having been presented with such information by the United Kingdom, and absent any challenge by third parties, and, in particular, by UKDRA, the Commission could, on that basis, consider the 2 MW de minimis participation threshold to be low enough that it encouraged the participation of DSR operators in the capacity market. 178. Thus, I find that the General Court erred in holding, in paragraphs 256 to 258 of the judgment under appeal, that the 2 MW de minimis participation threshold gave rise to serious difficulties as to whether the measure at issue provided an adequate incentive for DSR operators to participate in the capacity market. 179. I conclude that the second part of the single ground of appeal must be upheld. Thus, the appeal must be upheld in its entirety, and the judgment under appeal must be set aside. B. The action before the General Court 180. In accordance with the first paragraph of Article 61 of the Statute of the Court of Justice of the European Union, if the appeal is well founded, the Court of Justice shall quash the decision of the General Court. It may itself give final judgment in the matter, where the state of the proceedings so permits. I consider that this is so in the present case. 181. Before the General Court, Tempus put forward, alongside its first plea alleging infringement of Article 108(2) TFEU, a second plea alleging infringement of the Commission’s obligation to state reasons under the second subparagraph of Article 296 TFEU. The General Court, having upheld the first plea and annulled the decision at issue on that ground, did not find it necessary to examine the second plea. (79) That examination has now become necessary. 182. The second plea is divided into seven parts, which I will examine below in turn. I take the view that all parts and, therefore, that plea, should be dismissed. 183. According to case-law, the decision not to initiate the formal investigation procedure provided for in Article 108(2) TFEU must simply set out the reasons for which the Commission takes the view that it is not faced with serious difficulties in assessing the compatibility of the aid at issue with the internal market, and even a succinct statement of reasons for that decision must be regarded as sufficient for the purpose of satisfying the requirement to state adequate reasons laid down in Article 296 TFEU if it nevertheless discloses in a clear and unequivocal fashion the reasons for which the Commission considered that it was not faced with serious difficulties, the question of whether the reasoning is well founded being a separate matter. (80) 184. In the first part of its second plea, Tempus submits that there is a contradiction between recital 107 of the decision at issue, which refers to ‘mature DSR providers’, and recital 131 thereof, according to which DSR industry ‘is still in its infancy’. I see no contradiction between those recitals, as the latter concerns the DSR sector in general, while the former relates to specific DSR operators which the United Kingdom considers to be ‘mature’ (as opposed to other DSR operators, also referred to in recital 107, which are said to be ‘not yet mature enough’). Thus, the first part of the second plea should be dismissed. 185. In the second part of its second plea, Tempus contends, in essence, that the Commission failed to set out the reasons why its finding in recital 152 of the decision at issue, according to which the duration of the capacity contracts was long enough to allow new entrants into the market, was true also of DSR operators in spite of their different lead time, referred to in recital 134 of that decision. However, it seems to me that, as the Commission argues, the question whether one-year contracts may ensure DSR participation in the capacity market depends primarily on the financial needs of those operators, rather than on their lead times. Thus, in the light of the Court’s statement that a succinct statement of reasons may be sufficient, (81) it is irrelevant that, in respect of the length of capacity contracts, the decision at issue makes no reference to the different lead time of DSR operators. It follows that the second part of the second plea should also be dismissed. 186. In the third part of its second plea, Tempus claims that the Commission failed to explain how, in the light of paragraph 232(a) of the Guidelines, the exclusion of DSR operators holding a capacity agreement for the enduring regime from participating in transitional auctions may ‘improv[e] DSR’ as stated in recital 128 of the decision at issue. It is true that DSR operators are precluded from participating in the transitional auctions if they hold a capacity agreement for the enduring regime. (82) However, it is apparent from recitals 122 and 140 of the decision at issue that transitional auctions are intended to promote the development of the DSR sector — and thereby ‘improv[e]’ that sector’ — by helping only those DSR operators that are not yet mature enough to compete against generators in the enduring auctions (as opposed to mature DSR operators that do not require such help). Consequently, the third part of the second plea should be dismissed. 187. In the fourth part of its second plea, Tempus submits that the Commission failed to address the question whether the cost recovery method adopted blunted the price signal that should be sent to customers to reduce their electricity consumption during triad periods. (83) I note that, as mentioned in point 146 above, the Commission accepted the position of the United Kingdom Government on the matter and stated, in recital 129 of the decision at issue, that the method adopted ‘retains an incentive to reduce demand at peak times, while being predictable for suppliers’. It is apparent from that recital that the Commission considers the method adopted to be a compromise between, on the one hand, the requirement to provide an adequate incentive to reduce consumption, and, on the other hand, the need to ensure predictability for suppliers over the amount of the suppliers’ charge and to avoid that higher risk premiums be passed on to customers. (84) Thus, the fourth part of the second plea should be dismissed. 188. In the fifth part of its second plea, Tempus claims that the Commission failed to address the question whether, rather than open-ended capacity agreements, time-bound capacity agreements could be used under the enduring regime. I should mention that Tempus explains, in that regard, that, under open-ended capacity agreements, there is no time limit for making the additional capacity available upon occurrence of a stress event (that is, if a stress event occurs at 5 pm, the obligation to provide capacity could run indefinitely); and that open-ended capacity agreements disadvantage DSR operators. It is true that the decision at issue does not address the question whether DSR operators are being discriminated against, or treated unfairly, by reason of the use of open-ended capacity agreements under the enduring regime. However, the Commission did not fail to comply with its obligation to state reasons in that regard, given that it is not necessary for it to go into all the relevant facts and points of law, (85) and that it is not disputed that that question was not raised by UKDRA or any third party during the administrative procedure. Therefore, I consider that the fifth part of the second plea should be dismissed. 189. In the sixth part of its second plea, Tempus submits that the Commission failed to set the reasons why unproven DSR operators must pay a bid bond of the same amount as new generators. (86) It is true that, while recitals 26 and 72 of the decision at issue make reference to the obligation of unproven DSR operators and new generators to provide ‘collateral’ (credit support), that decision does not address the issue whether DSR operators are being discriminated against, or treated unfairly, by reason of the fact that a bid bond of the same amount is required of those operators and of new generators. However, in my view, the Commission did not breach its obligation to state reasons by failing to address that issue, given that, first, the need for collateral in cases of unproven reliability is easily understandable in the light of the objective to ensure security of supply, and, second, it is not disputed that that issue was not raised by a third party during the administrative procedure. Thus, the sixth part of the second plea must be dismissed. 190. In the seventh part of its second plea, Tempus contends that the Commission failed to state its reasons for not objecting to the lack of additional remuneration for DSR operators for savings of the amount of electricity lost during transmission and distribution. I note that, in recital 140 of the decision at issue, the Commission stated that, ‘in the light of the objective pursued by [the measure at issue]’, such lack of additional remuneration was ‘justifiable’. I agree that the objective of ensuring generation adequacy requires that capacity be provided so as to meet demand, and bears no relation to the transmission and distribution – and, thus, the sale – of electricity. (87) Thus, the seventh part of the second plea must be dismissed. 191. I conclude that the second plea put forward by Tempus before the General Court must be dismissed. 192. It follows that the action brought at first instance must be dismissed. VI. Costs 193. According to Article 184(2) of the Rules of Procedure, where the appeal is well founded and the Court itself gives final judgment in the case, the Court shall make a decision at to the costs. 194. Under Article 138(1) of the Rules of Procedure, which is applicable to appeal proceedings by virtue of Article 184(1) of those rules, the unsuccessful party shall be ordered to pay the costs if they have been applied for in the successful party’s pleadings. In the present case, Tempus has been unsuccessful, and the Commission has applied for costs. Thus, Tempus should be ordered to bear its own costs and pay those incurred by the Commission. 195. Under Article 184(4) of the Rules of Procedure, where an intervener at first instance takes part in the appeal proceedings, the Court may decide that he or she shall bear his or her own costs. As the United Kingdom intervened in the proceedings before the General Court and took part in the appeal proceedings, it should bear its own costs. 196. Under Article 140(1) of the Rules of Procedure, which is applicable to appeal proceedings by virtue of Article 184(1) of those rules, the Member States which have intervened in the proceedings should bear their own costs. Thus, the Republic of Poland should be ordered to bear its own costs. VII. Conclusion 197. I therefore propose that the Court should: – set aside the judgment of 15 November 2018, Tempus Energy and Tempus Energy Technology v Commission (T‑793/14, EU:T:2018:790); – dismiss the action brought by Tempus Energy Ltd and Tempus Energy Technology Ltd for the annulment of Commission Decision C(2014) 5083 final of 23 July 2014 not to raise objections to the aid scheme for the capacity market in the United Kingdom; – order Tempus Energy Ltd and Tempus Energy Technology Ltd to bear their own costs and to pay the costs incurred by the European Commission; – order the United Kingdom of Great Britain and Northern Ireland and the Republic of Poland to bear their own costs. 1 Original language: English. 2 T‑793/14, EU:T:2018:790. 3 Decision C(2014) 5083 final of 23 July 2014 not to raise objections to the aid scheme for the capacity market in the United Kingdom (SA.35980) (OJ 2014 C 348, p. 5). 4 OJ 2014 C 200, p. 1. 5 Regulation of 22 March 1999 laying down detailed rules for the application of [Article108 TFEU] (OJ 1993 L 83, p. 1). 6 OJ 2009 C 136, p. 13. 7 As explained in points 144 and 145 below. 8 UKDRA is an association of aggregators of the electricity consumption of industrial and commercial consumers, of which Tempus is a member. 9 See paragraphs 218 and 253 to 258 of the judgment under appeal. 10 Judgment of 11 March 2020, Commission v Gmina Miasto Gdynia and Port Lotniczy Gdynia Kosakowo (C‑56/18 P, EU:C:2020:192, paragraph 66). 11 See, by analogy, judgment of 24 March 2011, ISD Polska and Others (C‑369/09 P, EU:C:2011:175, paragraph 67); orders of 25 October 2016, VSM Geneesmiddelen v Commission (C‑637/15 P, not published, EU:C:2016:812, paragraph 42); of 7 December 2017, Eurallumina v Commission (C‑323/16 P, not published, EU:C:2017:952, paragraphs 41 and 73); judgment of 25 July 2018, Orange Polska v Commission (C‑123/16 P, EU:C:2018:590, paragraphs 41 to 44); order of 18 October 2018, Alex v Commission (C‑696/17 P, not published, EU:C:2018:848, paragraphs 31 and 32); judgment of 28 November 2019, Brugg Kabel and Kabelwerke Brugg v Commission (C‑591/18 P, not published, EU:C:2019:1026, paragraphs 43, 52, 61, 68 and 76); and order of 12 November 2020, Lazarus v Commission (C‑85/20 P, not published, EU:C:2020:912, paragraph 40). 12 Judgments of 2 April 1998, Commission v Sytraval and Brink’s France (C‑367/95 P, EU:C:1998:154, paragraph 38); of 22 December 2008, British Aggregates v Commission (C‑487/06 P, EU:C:2008:757, paragraph 27); of 21 July 2011, Alcoa Trasformazioni v Commission (C‑194/09 P, EU:C:2011:497, paragraph 57); and of 17 September 2015, Mory and Others v Commission (C‑33/14 P, EU:C:2015:609, paragraph 94). 13 Judgments of 2 April 1998, Commission v Sytraval and Brink's France (C‑367/95 P, EU:C:1998:154, paragraph 39); of 22 December 2008, British Aggregates v Commission (C‑487/06 P, EU:C:2008:757, paragraphs 186 and 187); of 24 January 2013, 3F v Commission (C‑646/11 P, not published, EU:C:2013:36, paragraph 28); of 21 December 2016, Club Hotel Loutraki and Others v Commission (C‑131/15 P, EU:C:2016:989, paragraph 30); and of 3 September 2020, Vereniging tot Behoud van Natuurmonumenten in Nederland and Others v Commission (C‑817/18 P, EU:C:2020:637, paragraphs 75 and 76). 14 Judgments of 27 October 2011, Austria v Scheucher - Fleisch and Others (C‑47/10 P, EU:C:2011:698, paragraphs 71 and 72); of 21 December 2016, Club Hotel Loutraki and Others v Commission (C‑131/15 P, EU:C:2016:989, paragraphs 31 and 32); and of 3 September 2020, Vereniging tot Behoud van Natuurmonumenten in Nederland and Others v Commission (C‑817/18 P, EU:C:2020:637, paragraphs 79 and 80). 15 Judgments of 24 January 2013, 3F v Commission (C‑646/11 P, not published, EU:C:2013:36, paragraphs 30 and 31), and of 3 September 2020, Vereniging tot Behoud van Natuurmonumenten in Nederland and Others v Commission (C‑817/18 P, EU:C:2020:637, paragraph 82). 16 See paragraphs 111 and 267 of the judgment under appeal. 17 See paragraphs 116 and 267 of the judgment under appeal. 18 Judgments of 13 June 2013, Ryanair v Commission (C‑287/12 P, not published, EU:C:2013:395, paragraph 71); of 21 December 2016, Club Hotel Loutraki and Others v Commission (C‑131/15 P, EU:C:2016:989, paragraph 35); of 15 March 2001, Prayon-Rupel v Commission (T‑73/98, EU:T:2001:94, paragraph 45); and of 15 October 2020, První novinová společnost v Commission (T‑316/18, not published, EU:T:2020:489, paragraph 92). 19 See Article 6(1) and Article 20(1) of Regulation No 659/1999. See also judgment of 17 September 2015, Mory and Others v Commission (C‑33/14 P, EU:C:2015:609, paragraph 94). 20 Judgments of 22 September 2011, Belgium v Deutsche Post and Others (C‑148/09 P, EU:C:2011:603, paragraph 87); of 27 October 2011, Austria v Scheucher - Fleisch and Others (C‑47/10 P, EU:C:2011:698, paragraph 80); of 24 January 2013, 3F v Commission (C‑646/11 P, not published, EU:C:2013:36, paragraph 36); and of 3 September 2020, Vereniging tot Behoud van Natuurmonumenten in Nederland and Others v Commission (C‑817/18 P, EU:C:2020:637, paragraph 119). 21 Regulation of 13 July 2015 laying down detailed rules for the application of Article 108 of the Treaty on the Functioning of the European Union (codification) (OJ 2015 L 248, p. 9). Regulation 2015/1589 (which is not applicable to the present case) repealed and replaced Regulation No 659/1999. 22 Judgments of 22 December 2008, British Aggregates v Commission (C‑487/06 P, EU:C:2008:757, paragraph 189); of 2 April 2009, Bouygues and Bouygues Télécom v Commission (C‑431/07 P, EU:C:2009:223, paragraph 77); of 13 June 2013, Ryanair v Commission (C‑287/12 P, not published, EU:C:2013:395, paragraph 71); order of 11 February 2015, Iliad and Others v Commission (C‑624/13 P, not published, EU:C:2015:112, paragraph 59); judgments of 12 October 2016, Land Hessen v Commission (C‑242/15 P, not published, EU:C:2016:765, paragraph 39); of 21 December 2016, Club Hotel Loutraki and Others v Commission (C‑131/15 P, EU:C:2016:989, paragraph 38); and order of 25 June 2019, Fred Olsen v Naviera Armas (C‑319/18 P, not published, EU:C:2019:542, paragraph 31). 23 Judgments of 20 March 1984, Germany v Commission (84/82, EU:C:1984:117, paragraph 13); of 19 May 1993, Cook v Commission (C‑198/91, EU:C:1993:197, paragraphs 29 and 38); and of 15 June 1993, Matra v Commission (C‑225/91, EU:C:1993:239, paragraph 33). 24 See point 40 above. 25 Judgments of 2 September 2010, Commission v Scott (C‑290/07 P, EU:C:2010:480, paragraph 90); of 15 November 2011, Commission and Spain v Government of Gibraltar and United Kingdom (C‑106/09 P and C‑107/09 P, EU:C:2011:732, paragraph 148); of 3 April 2014, France v Commission (C‑559/12 P, EU:C:2014:217, paragraph 63); of 19 September 2018, Commission v France and IFP Énergies nouvelles (C‑438/16 P, EU:C:2018:737, paragraph 110); of 11 December 2019, Mytilinaios Anonymos Etairia – Omilos Epicheiriseon v Commission (C‑332/18 P, EU:C:2019:1065, paragraph 123); and of 26 March 2020, Larko v Commission (C‑244/18 P, EU:C:2020:238, paragraph 67). 26 I should also mention that that finding was reiterated by the General Court in the context of an action seeking the annulment of a decision not to raise objections (see judgment of 12 September 2019, Achemos Grupė and Achema v Commission, T‑417/16, not published, EU:T:2019:597, paragraph 52). The appeal brought against that judgment is pending (see Achemos Grupė and Achema v Commission, C‑847/19 P). 27 Judgment of 1 March 2016, Secop v Commission (T‑79/14, EU:T:2016:118, paragraph 76). 28 Judgments of 18 January 2017, Andersen v Commission (T‑92/11 RENV, not published, EU:T:2017:14, paragraph 57); of 19 June 2019, NeXovation v Commission (T‑353/15, EU:T:2019:434, paragraph 196). 29 See Article 10(1) and Article 20(2) of Regulation No 659/1999, as modified by Council Regulation (EU) No 734/2013 of 22 July 2013 amending Regulation No 659/1999 (OJ 2013 L 204, p. 15). See also judgments of 2 April 1998, Commission v Sytraval and Brink’s France (C‑367/95 P, EU:C:1998:154, paragraph 62); of 15 March 2018, Naviera Armas v Commission (T‑108/16, EU:T:2018:145, paragraph 101); and of 15 October 2020, První novinová společnost v Commission(T‑316/18, not published, EU:T:2020:489, paragraph 152). 30 The concept of ‘interested party’ is defined by Article 1(h) of Regulation No 659/1999 as ‘any Member State and any person, undertaking or association of undertakings whose interests might be affected by the granting of aid, in particular the beneficiary of the aid, competing undertakings and trade associations’. 31 Judgments of 8 May 2008, Ferriere Nord v Commission (C‑49/05 P, not published, EU:C:2008:259, paragraph 69), and of 11 March 2020, Commission v Gmina Miasto Gdynia and Port Lotniczy Gdynia Kosakowo (C‑56/18 P, EU:C:2020:192, paragraph 71). 32 See, in particular, judgments of 14 January 2004, Fleuren Compost v Commission (T‑109/01, EU:T:2004:4, paragraph 49); of 15 March 2018, Naviera Armas v Commission (T‑108/16, EU:T:2018:145, paragraph 99); of 12 September 2019, Achemos Grupė and Achema v Commission (T‑417/16, not published, EU:T:2019:597, paragraph 60); of 16 January 2020, Iberpotash v Commission (T‑257/18, EU:T:2020:1, paragraph 93); of 13 May 2020, Germanwings v Commission (T‑716/17, EU:T:2020:181, paragraph 130); and of 5 October 2020, France and IFP Énergies nouvelles v Commission (T‑479/11 RENV and T‑157/12 RENV, EU:T:2020:461, paragraph 135). 33 To my knowledge, only on two occasions was that finding made in relation to decisions adopted at the end of a preliminary examination procedure: see judgments of 15 March 2018, Naviera Armas v Commission (T‑108/16, EU:T:2018:145, paragraph 99), and of 12 September 2019, Achemos Grupė and Achema v Commission (T‑417/16, not published, EU:T:2019:597, paragraph 60). 34 C‑367/95 P, EU:C:1998:154, paragraph 60. 35 See Annex IV to Commission Regulation (EC) No 794/2004 of 21 April 2004 implementing Regulation No 659/1999 (OJ 2004 L 140, p. 1), as modified by Commission Regulation (EU) No 372/2014 of 9 April 2014 amending Regulation No 794/2004 as regards the calculation of certain time limits, the handling of complaints, and the identification and protection of confidential information (OJ 2014 L 109, p. 14). 36 Regulation No 734/2013 thereby sought to limit the impact on the Commission’s workload of the case-law which grants interested parties the right to set in motion the preliminary examination procedure upon submission of a complaint, irrespective of the latter’s content – rather than leave the Commission discretion to decide whether or not to open that procedure (judgment of 17 July 2008, Athinaïki Techniki v Commission, C‑521/06 P, EU:C:2008:422, paragraph 37). See, in that regard, Gambaro, E., and Mazzocchi, F. ‘Private parties and State aid procedure: A critical analysis of the changes brought by Regulation 734/2013’, Common Market Law Review, vol. 53, pp. 385 to 418, at pp. 398 and 399. See also judgment of 16 May 2013, Commission v Ryanair(C‑615/11 P, not published, EU:C:2013:310, paragraphs 36 and 37). 37 For an example of that approach, see the judgment of 9 September 2020, Kerkosand v Commission (T‑745/17, EU:T:2020:400, paragraph 97), whereby the General Court found that the Commission’s lack of diligence could not be justified by the fact that it could rely on the information provided by the Member State concerned since, in particular, the applicant — a competitor of the beneficiary — had adduced evidence to the contrary during the administrative procedure. 38 See recitals 96 to 102 of the decision at issue. 39 See recitals 105 to 107 of the decision at issue. 40 See recitals 129, 138 to 140, 147, 154 and 155 of the decision at issue. 41 Additionally unless an interested party has brought a complaint by using the compulsory form (see point 91 above). 42 Judgments of 22 September 2011, Belgium v Deutsche Post and Others(C‑148/09 P, EU:C:2011:603, paragraph 81); of 24 January 2013, 3F v Commission (C‑646/11 P, not published, EU:C:2013:36, paragraph 32); and of 15 October 2020, První novinová společnost v Commission (T‑316/18, not published, EU:T:2020:489, paragraph 116). 43 See point 84 of the judgment under appeal, and recital 1 of the decision at issue. 44 See paragraph 93 of the judgment under appeal. 45 As, on the same date (17 June 2014), the Commission informed the United Kingdom that it considered that the measure at issue was prima facie compatible with the internal market and sent the last set of questions to the United Kingdom (see paragraphs 96 and 97 of the judgment under appeal). 46 Judgments of 10 July 2012, TF1 and Others v Commission (T‑520/09, not published, EU:T:2012:352, paragraph 72); of 16 September 2013, Iliad and Others v Commission (T‑325/10, not published, EU:T:2013:472, paragraph 52); and of 3 December 2014, Castelnou Energía v Commission (T‑57/11, EU:T:2014:1021, paragraphs 61 and 66). 47 Judgments of 28 March 2012, Ryanair v Commission (T‑123/09, EU:T:2012:164, paragraph 168); of 3 December 2014, Castelnou Energía v Commission (T‑57/11, EU:T:2014:1021, paragraph 66); and of 15 October 2020, První novinová společnost v Commission (T‑316/18, not published, EU:T:2020:489, paragraphs 14, 47, 54 and 108). 48 Judgment of 15 October 2020, První novinová společnost v Commission (T‑316/18, not published, EU:T:2020:489, paragraphs 118 and 119), and the case-law cited. 49 Judgment of 9 June 2016, Magic Mountain Kletterhallen and Others v Commission (T‑162/13, not published, EU:T:2016:341, paragraph 149). See also opinion of Advocate General Trstenjak in Bouygues and Bouygues Télécom v Commission(C‑431/07 P, EU:C:2008:545, point 220); and judgment of 11 July 2007, Asklepios Kliniken v Commission (T‑167/04, EU:T:2007:215, paragraphs 89 and 90). 50 The Commission’s awareness may be deduced from the fact that the decision at issue quotes the PTE’s Report, which states, inter alia, that the panel ‘remains concerned that not enough evidence has been provided on the potential contribution that demand side might make’, and that ‘NG were unable to carry out analysis on the demand side with the rigour and distinction which has been the hallmark of their other work’ (see recitals 120, 121, 122 and 124 of the decision at issue; and paragraphs 19 and 102 of the PTE’s Report, reproduced in paragraphs 141 and 142 of the judgment under appeal). 51 See recitals 122 ad 128 of the decision at issue. 52 See paragraph 87 above. 53 See point 96 above. 54 See points 83 and 110 above. 55 Reference should be made, in that regard, to the Commission’s Communication of 5 November 2013, ‘Delivering the internal electricity market and making the most of public intervention’ (C(2013) 7243 final), according to which: ‘[t]he potential of the demand side in markets is currently underutilised. … The potential of the demand side response at the Union scale is enormous: peak demand could be reduced by 60 GW, approximately 10% of EU’s peak demand’ (p. 5 and 6). I also note that the long-term importance of DSR was reaffirmed, after the adoption of the decision at issue, in the Commission’s Final Report of the Sector Inquiry on Capacity Mechanisms, of 30 November 2016 (COM(2016) 752 final) (p. 11). 56 See paragraphs 96 and 101 of the PTE’s Report, reproduced in paragraph 142 of the judgment under appeal. 57 See Commission Decision (EU) 2020/348 of 24 October 2019 on the aid scheme SA.35980 – 2019/C – United Kingdom – Electricity Market Reform: Capacity Mechanism (C(2019) 7610 final) (OJ 2020 L 70, p. 1) (‘the 2019 decision’). See recitals 128(d), 169 and 257 of the 2019 decision. 58 The Polish Government does not take position on the matter. 59 See recital 69 of the decision at issue, and paragraph 200 of the judgment under appeal. 60 See paragraph 209 of the judgment under appeal, and recital 107 of the decision at issue. 61 See recitals 107 and 129 of the decision at issue. 62 I disagree with the Commission’s contention that the General Court erred in referring, in paragraph 199 of the judgment under appeal, to paragraph 69 of the Guidelines. In that regard, I note that paragraph 69 of the Guidelines belongs to Section 3.2 thereof, entitled ‘General compatibility provisions’. According to paragraph 25 of the Guidelines, ‘Section 3.2 sets out the general compatibility conditions applicable to all aid measures falling within the scope of these Guidelines, unless the more specific sections of Chapter 3 specify or amend these general compatibility conditions’. Admittedly, paragraphs 228 to 231 of the Guidelines, which belong to Chapter 3 thereof (more precisely, to Section 3.9 thereof, entitled ‘Aid for generation adequacy’), specify the conditions for the proportionality of aid in relation to aid for generation adequacy. Nevertheless, I fail to see how paragraphs 228 to 231 of the Guidelines could be regarded as precluding the application of paragraph 69 thereof, which does little more than define in very general terms the proportionality of the aid. Besides, paragraph 25 of the Guidelines does not state that, where Chapter 3 specifies or amends the general compatibility conditions set out in Section 3.2, Section 3.2 does not apply. Rather, paragraph 25 of the Guidelines should be understood as meaning that, in that case, it is not sufficient that the aid meets the conditions set out in Section 3.2 for it to be considered proportionate. It must also meet the relevant ‘more specific’ conditions laid down in Chapter 3. 63 Judgments of 27 October 2005, Distribution Casino France and Others (C‑266/04 to C‑270/04, C‑276/04 and C‑321/04 to C‑325/04, EU:C:2005:657, paragraphs 34 and 40); of 22 December 2008, Régie Networks (C‑333/07, EU:C:2008:764, paragraphs 89 and 99); of 10 November 2016, DTS Distribuidora de Televisión Digital v Commission (C‑449/14 P, EU:C:2016:848, paragraphs 65 and 68); of 20 September 2018, Carrefour Hypermarchés and Others (C‑510/16, EU:C:2018:751, paragraphs 14 and 19); and of 3 March 2020, Vodafone Magyarország (C‑75/18, EU:C:2020:139, paragraphs 26 and 27). 64 Judgment of 10 November 2016, DTS Distribuidora de Televisión Digital v Commission (C‑449/14 P, EU:C:2016:848, paragraphs 69 to 72). 65 Judgment of 22 December 2008, Régie Networks (C‑333/07, EU:C:2008:764, paragraphs 104 and 106 to 112). 66 See recital 69 of the decision at issue, according to which ‘[t]he costs of the [c]apacity [m]arket (i.e. those incurred to fund capacity payments to providers) will be paid by all licensed suppliers according to the following process: … supplier charges … are levied upon licensed suppliers…’. 67 See recitals 13, 73 and 111 of the decision at issue. 68 Given that the amount of aid depends on the volume of capacity purchased and the clearing price (see recital 69 of the decision at issue, and paragraph 204 of the judgment under appeal). 69 See paragraph 208 of the judgment under appeal and recital 102 of the decision at issue. 70 See recital 46 of the decision at issue. 71 The Polish Government does not take position on the matter. 72 Reference should be made, in that regard, to the 2019 decision, according to which ‘the [United Kingdom] Government expects to run T‑4 and T‑1 capacity auctions every year, but it is only once prequalification for an auction is completed, when the Government is able to make a final decision about whether to hold a capacity auction’ (recital 64 of that decision); and ‘the Secretary of State may decide not to organise T‑1 auctions’ (recitals 281 and 332 of the same decision). 73 Emphasis added. 74 See judgment of 13 June 2013, Ryanair v Commission (C‑287/12 P, not published, EU:C:2013:395, paragraph 67). 75 I should mention that, according to the United Kingdom Government’s written submission in the present appeal and to recitals 281 and 332 of the 2019 decision, this has not happened so far. 76 See recitals 16 and 17 of the decision at issue, and paragraphs 12 and 13 of the judgment under appeal. 77 See paragraph 14 of the judgment under appeal. 78 See paragraphs 105 and 106 of the PTE’s Report, reproduced in paragraph 142 of the judgment under appeal. 79 See paragraph 269 of the judgment under appeal. 80 Judgments of 22 December 2008, Régie Networks (C‑333/07, EU:C:2008:764, paragraphs 65, 70 and 71); of 27 October 2011, Austria v Scheucher - Fleisch and Others (C‑47/10 P, EU:C:2011:698, paragraph 111); of 12 May 2016, Hamr - Sport v Commission (T‑693/14, not published, EU:T:2016:292, paragraph 54); of 6 May 2019, Scor v Commission (T‑135/17, not published, EU:T:2019:287, paragraph 79); and of 15 October 2020, První novinová společnost v Commission(T‑316/18, not published, EU:T:2020:489, paragraph 217). 81 See point 183 above. 82 See point 13 above, and recital 140 of the decision at issue. 83 See points 144, 145, 160 and 163 above. 84 As explained in point 145 above. 85 Judgments of 22 December 2008, British Aggregates v Commission (C‑487/06 P, EU:C:2008:757, paragraph 172); and of 4 June 2020, Hungary v Commission(C‑456/18 P, EU:C:2020:421, paragraph 57). 86 See point 172 above, and paragraphs 14 and 248 to 252 of the judgment under appeal. 87 Reference should also be made to paragraph 265 of the judgment under appeal – not challenged by the Commission in its appeal – in which the General Court held that the lack of additional remuneration mentioned above was consistent with paragraph 225 of the Guidelines, which requires that the aid remunerate solely the service of pure availability, and precludes that it remunerate the sale of electricity. See point 27 above.