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In these circumstances the Nacka tingsrätt — Mark- och miljödomstolen (Court of First Instance of Nacka — Property and Environmental Affairs Chamber) decided to stay proceedings and refer to the Court the following questions: ‘(1) In the calculation of the cross-sectoral correction factor for the industrial sector, is it compatible with Article 10a(1) and (4) of Directive 2003/87 to attribute all emissions from incineration of waste gases for electricity production to the auction pot and not to the industry ceiling, despite the fact that emissions from residual gas are eligible for free allocation of allowances under Article 10a(1) of that directive? (2) In the calculation of the cross-sectoral correction factor for the industrial sector, is it compatible with Article 10a(1) and (4) of Directive 2003/87 to attribute all emissions produced in heat production in cogeneration installations for onward delivery to installations covered by the EU emissions trading system to the auction pot and not to the industry ceiling, despite the fact that the emissions from heat production are eligible for allocation of free allowances under Article 10a(4) of Directive 2003/87? (3) If the answers to questions 1 and 2 are negative, is the calculation, in that case, of the industries’ share (34.78%) of the total emissions in the reference period correct? (4) Is Commission Decision 2013/448/EU invalid and incompatible with the [second] subparagraph of Article 10a(5) of Directive 2003/87, since the Commission’s calculation of the industry ceiling means that a cross-sectoral correction factor must inevitably be applied instead of being applied ‘if necessary’? (5) Has the product benchmark for hot metal been established in accordance with Article 10a(2) of Directive 2003/87 on the basis of the fact that, in defining the principles for setting ex ante benchmarks, the starting point is to be the average performance of the 10% most efficient installations in the relevant sector? (6) As regards the free allocation of allowances for the export of heating to private households, is it compatible with Article 10a(4) of Directive 2003/87 not to grant allocation of free allowances in respect of heating which is exported to private households? (7) In connection with applications for the free allocation of allowances, is it compatible with Annex IV to Commission Decision 2011/278/EU, as the Swedish Environmental Protection Agency has done, not to state all greenhouse gas emissions arising from the production of heating which is exported to private households? (8) In the allocation of free allowances for the export of heating to private households, is it compatible with Article 10a(1) and (4) of Directive 2003/87 and Article 10(3) of Commission Decision 2011/278/EU not to give allocation of extra free allowances in respect of the fossil-fuel emissions which exceed the allocation given for heating exported to private households? (9) In connection with applications for allocation of free allowances, is it compatible with Annex IV to Commission Decision 2011/278/EU, as the Swedish Environmental Protection Agency has done, to adjust the figures in an application so that the greenhouse gas emissions attributable to the incineration of waste gases are equated to those attributable to the incineration of natural gas? (10) Does Article 10(8) of Commission Decision 2011/278/EU mean that an operator cannot obtain an allocation of free allowances in respect of heat consumption in a heat benchmark sub-installation produced in a different fuel benchmark sub-installation? (11) If the answer to question 10 is affirmative, does Article 10(8) of Commission Decision 2011/278/EU run counter to Article 10a(1) of Directive 2003/87? (12) In the allocation of free allowances in respect of heat consumption, is it compatible with Directive 2003/87 and Guidance Documents No 2 and 6 to have regard in the assessment to the heat source which produces the heat consumed? (13) Is Commission Decision 2013/448/EU invalid and incompatible with Article 290 TFEU and Article 10a(1) and (5) of Directive 2003/87 on the basis that it alters the calculation method set out in Article 10a(5), [first] subparagraph, (a) and (b) of Directive 2003/87 by excluding from the basis of calculation emissions which are caused by the incineration of waste gases and the production of combined heat and power, despite the fact that the free allocation of allowances is permitted in that regard pursuant to Article 10a(1) and (4) of Directive 2003/87 and Commission Decision 2011/278/EU? (14) Is measurable heat in the form of steam from an [EU emissions trading system] installation which is delivered to a steam network with many consumers of steam, of which at least one is not an [EU emissions trading system] installation, to be regarded as constituting a heat benchmark sub-installation under Article 3(c) of Commission Decision 2011/278/EU? (15) Is it relevant to the answer to question 14: (a) whether the steam network is owned by the largest consumer of steam in the network and that consumer is an [EU emissions trading system] installation, (b) what share of the total heat delivery to the steam network is used by the largest consumer, (c) how many suppliers and consumers of steam there are in the steam network, (d) whether there is uncertainty as to who has produced the measurable heat which the respective consumers of steam acquire, and (e) whether the allocation of steam usage within the network can be altered in such a way that a number of consumers of steam which are not [EU emissions trading system] installations join it or the existing non- [EU emissions trading system] installations’ usage increases? (16) If the answer to question 14 depends on the facts of the individual case, to which facts is particular weight to be given?’