BOUNDARIES INTERNATIONAL LAND BORDER is based on the official border map between the Sultanate of Oman and the Republic of Yemen produced in 1996. scale 1:50,000 according to the Border Agreement between the two countries signed on 1st October 1992. The Maritime boundary shown on the chart between the Sultanate of Oman and the Republic of Yemen is based in the Maritime Agreement between the two countries signed on 14 December 2003.