Categories Treaty Vienna Convention on the Law of Treaties اتفاقية فيينا لقانون المعاهدات Post author By admin Post date August 28, 1990 Download Ratified by Royal Decree 63/90. ← Royal Decree 62/90 Delegating the Singing of the Memorandum of Understanding on Cultural and Media Cooperation between the Government of the Sultanate of Oman and the Government of Zanzibar → United Nations Convention on Conditions for Registration of Ships