Categories Royal Decree Royal Decree 12/98 Granting Omani Nationality 1998/12 12/1998 98/12 12/98 Post author By admin Post date February 28, 1998 Arabic Auto Translate Published in Official Gazette 618 issued on 1 March 1998. ← Agreement for the Avoidance of Double Taxation and the Prevention of Tax Evasion for Taxes on Income between the Government of the Sultanate of Oman and the Government of the Republic of Tunisia → Ministry of Transportation: Ministerial Decision 45/98 Amending the Departure Fees in Seeb International Airport