Categories Treaty International Convention for the Regulation of Whaling الاتفاقية الدولية لتنظيم صيد الحيتان Post author By admin Post date June 19, 1980 Download Ratified by Royal Decree 55/80. ← Royal Decree 52/80 Appointing an Undersecretary for the Ministry of Royal Diwan Affairs → Royal Decree 56/80 Appointing Members to the Board of Directors Representing the Stake of the Government in Petroleum Development Oman Limited Liability Company