Legislative texts shall set out certain procedures for the implementation of the present Decree, which shall apply both to works already published in any way and to future works. Article 67 All previous provisions contrary to this Decree, in particular Law No. 57-298, of March 11, 1957, on Literary and Artistic Property, as well as Decree No. 58-447, establishing a Public Administration Regulation for the Implementation in the Overseas Territories of said Law, shall be repealed. Article 68 The present Decree shall be enforced as a law of the State and shall be published in the Official Journal of the Republic of Niger. Done at Niamey, March 30, 1993 Signed: Prime Minister AMADOU CHEIFFOU 20