24.7.90 Official Journal of the European Communities No L 192/1 (Acts whose publication is not obligatory) COUNCIL . : COUNCIL DIRECTIVE of 28 June 1990. on the establishment of the internal market for telecommunications services through ‘the implementation of open network provision (90/387/EEC) THE COUNCIL OF THE EUROPEAN COMMUNITIES, Having regard to- the Treaty -establishing the European Economic Community, and in particular Article 100a thereof, Having regard to the proposal from the Commission (1), In cooperation with the-European Parliament (?), Having regard to the opinion of the Economic and Social Committee (3), Whereas Article 8 a of the Treaty stipulates that the internal market shall comprise an area without internal frontiers in which the free movement of services is ensured, in accordance with the provisions of the Treaty; Whereas the Commission submitted a Green Paper on the development of the common market for telecommunications services and equipment, dated 30 June 1987, and a communication on the implementation of that Green Paper up to 1992, dated 9 February 1988; Whereas the Council adopted on 30 June 1988 a-resolution on the development of the common market for telecommunications services and equipment up to 1992 (*); Whereas the full establishment of a Community-wide market in telecommunications services will be promoted by the rapid (*) OJ No C 39, 16. 2. 1989, p. 8. (2) O] No C 158, 26. 6. 1989, p. 300, O] No.C 149,-18. 6. 1990. (*) OJ No C159, 26. 6. 1989, p. 37. . (*) O] No C 257, 4. 10. 1988. p. 1. introduction of harmonized principles and conditions for open network provision; Whereas, since situations differ and technical and " administrative constraints exist in the Member States, this objective should be realized in stages; Whereas the conditions of open network provision must be . consistent with certain principles and must not restrict access to networks and services except for reasons of general public interest, hereinafter referred to as ‘essential requirements’; Whereas the definition and application of such principles and essential requirements must take full account of the fact that any restrictions of the right to provide services within and between Member States must be objectively justified, must follow the principle of proportionality and must not be excessive in relation to the aim pursued; Whereas the conditions of open network provision must not allow for any additional- restrictions on the use of the public telecommunications network . and/or public- telecommunications services except those restrictions which may be derived from the exercise of special or exclusive rights granted by Member :States and which are compatible with Community law; Whereas tariff principles should be clearly laid down-to ensure fair and transparent conditions for all users; Whereas this entire Directive must be read in the light-of Annex Il which lays down a work programme for the first three years; Whereas the establishment of harmonized conditions of open network provision must be a progressive process and must be prepared with the assistance of a committee composed of