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Since those actions call into question the validity of the contested provisions of Decree 147/2005 in the light of the provisions of Regulation No 2042/2003, the Simvoulio tis Epikratias decided to stay the proceedings and refer the following questions to the Court for a preliminary ruling: ‘(1) Within the meaning of Article 2 of Regulation No 2042/2003, in conjunction with provision M.B.902(b), point 1, in Subpart I of Section B of Annex I to the said regulation, and in light of the requirements of provision AMC M.B.102(c)(1), subparagraphs 1.1 to 1.4, 1.6 and 1.7, in Subpart A of Section B of Annex 1 to Decision No 2003/19 …, does the national legislature have the discretion, when enacting additional measures for the implementation of the said regulation, to divide the job of aircraft review, in order to establish compliance with current airworthiness requirements, between several categories/specialisms of inspectors, each of whom is only required to inspect one particular aspect of the aircraft’s airworthiness? More importantly, is a national regulation, such as the critical regulation at issue, which makes provision for Airworthiness and Avionics Inspectors, Flight Operations Inspectors, Cabin Safety Inspectors and Licensing Inspectors, compatible with Regulation No 2042/2003? (2) If the answer to the previous question is in the affirmative, does provision M.B.902(b), point 1, in Subpart I of Section B of Annex I to Regulation No 2042/2003 mean that anyone to whom aircraft airworthiness inspection duties are assigned in respect of one particular aspect only must have five years experience in all aspects ensuring the continuing airworthiness of the aircraft or does it suffice if they have five years experience in the particular duties assigned to them and their particular specialism? (3) If the answer to the above question is that five years experience in the particular duties assigned to the inspection staff suffices, does a national regulation, such as the critical regulation at issue, which stipulates that Airworthiness and Avionics Inspectors responsible for supervising and controlling aircraft, approved maintenance organisations and air travel in accordance with the rules set out in the ICAO [International Civil Aviation Organisation] manual doc.9760 must have at least five years previous experience in an aircraft maintenance workshop and must have worked on aircraft maintenance, satisfy the requirements of the aforementioned provision M.B.902(b), point 1, in Subpart I of Section B of Annex I to Regulation No 2042/2003 requiring review staff to have “at least five years” experience in continuing airworthiness? (4) If the answer to the previous question is in the affirmative, is a national regulation, such as the critical regulation at issue, which equates holders of aircraft maintenance licences in accordance with Annex III (“Part‑66”) of the said regulation with holders of an aeronautical degree, by providing that both these categories of persons must have experience in an aircraft maintenance workshop in order to obtain accreditation as Airworthiness and Avionics Inspectors, compatible with Regulation No 2042/2003? (5) In light of the requirements of provision AMC M.B.102(c)(1), subparagraphs 1.4 and 1.5, in Subpart A of Section B of Annex I to Decision No 2003/19 …, does five years experience in continuing airworthiness, in accordance with provision M.B.902(b), point 1, in Subpart I of Section B of Annex I to the said Regulation No 2042/2003, mean practical experience which may have been acquired during the course of studies leading to academic qualification or only experience acquired under actual working conditions, independently of studies and once they have been completed and the qualification obtained? (6) Within the meaning of the above provision of Regulation No 2042/2003, does five years experience in continuing airworthiness also mean experience which may have been acquired by performing aircraft airworthiness inspections in the past, even before the said regulation entered into force? (7) Within the meaning of provision M.B.902(b), point 2, in Subpart I of Section B of Annex I to Regulation No 2042/2003 and for the purpose of initial selection as an inspector, must the holder of an aircraft maintenance licence in accordance with Annex III (“Part 66”) to the said Regulation No 2042/2003 undergo additional training in aspects of aircraft airworthiness prior to selection or does it suffice if that person is provided with such training after their initial selection and before they assume the duties of inspector? (8) Within the meaning of provision M.B.902(b), point 3, in Subpart I of Section B of Annex I to Regulation No 2042/2003, which requires inspection staff to have “formal aeronautical maintenance training”, can a training system adopted by the national legislature be construed as constituting such training if: (i) it provides training after the initial selection of an inspector based on formal qualifications alone; (ii) that training is not differentiated depending on the formal qualifications of the person initially selected as inspector and (iii) the training system does not make provision either for a procedure and criteria for evaluating trainees or for final examination of trainees on completion of training, in order to establish their aptitude? (9) Does provision M.B.902(b), point 4, in Subpart I of Section B of Annex I to Regulation No 2042/2003, providing that airworthiness review staff should have “a position with appropriate responsibilities”, mean that the position is a qualification which a person must have in order to be accredited as an inspector, in the sense that they must have held a senior position in their previous employment? Or does the above provision of Regulation No 2042/2003 mean, in light of the requirements of provision AMC M.B.902(b)(3) in Subpart A of Section B of Annex I to Decision No 2003/19 …, that, having been initially selected as an inspector, the person must be given a position in the airworthiness review authority which allows him to engage the liability of that authority by signing on its behalf? (10) If the aforementioned provision M.B.902(b), point 4, in Subpart I of Section B of Annex I to the regulation has the second meaning set out above, can the requirement of the regulation be construed, in light of that meaning, as being satisfied by a national regulation that makes provision for inspectors to be accredited following theoretical and practical training, at which point they can carry out aircraft airworthiness inspections and engage the liability of the competent authority by alone signing the inspection documents? (11) Furthermore, if the aforementioned provision M.B.902(b), point 4, in Subpart I of Section B of Annex I to Regulation No 2042/2003 has the second meaning set out above, is a national provision, such as the critical regulation at issue, which provides that it is desirable for persons initially selected as Airworthiness and Avionics Inspectors to have previously been promoted to “senior positions of responsibility in an aircraft maintenance workshop”, compatible with it? (12) Within the meaning of Regulation No 2042/2003, which does not regulate the question of whether and under what conditions persons performing airworthiness inspection duties before it entered into force are entitled to continue to perform such duties following the entry into force of the said regulation, was the national legislature obliged to provide that persons who were performing the duties of inspector when the above regulation entered into force (or possibly before then) should automatically be reaccredited as inspectors, without first undergoing a selection and appraisal procedure? Or does the above Regulation No 2042/2003, the aim of which is to improve the safety of air transport, not to safeguard the professional rights of employees of the Member State’s authority responsible for airworthiness reviews, mean that the Member States are simply granted the discretion, in light also of the relevant requirements of provision AMC M.B.902(b)(4) in Subpart A of Section B of Annex I to Decision No 2003/19 …, to continue, if they deem appropriate, to employ as airworthiness inspectors persons who were carrying out airworthiness reviews before the aforementioned regulation entered into force, even if those persons do not have the qualifications required under the said regulation? (13) If it is found that, within the meaning of Regulation No 2042/2003, the Member States are obliged automatically to reaccredit persons who were performing the duties of inspectors before the said regulation entered into force, without applying a selection procedure, is a national provision, such as the critical provision at issue, which provides that, in order to be reaccredited as inspectors, those persons must have actually been performing the duties of inspector not on the date on which the above regulation entered into force, but on the later date, when the said provision of national law entered into force, compatible with that regulation?’