22 December 1990 | Publisher: UN Security Council | Document type: Resolutions/Recommendations/Declarations
28 November 1983 | Publisher: National Legislative Bodies / National Authorities | Document type: National Legislation
1977 | Publisher: National Legislative Bodies / National Authorities | Document type: National Legislation
15 February 1975 | Publisher: National Legislative Bodies / National Authorities | Document type: Bilateral Treaties/Agreements