Decides that the Secretary-General should prepare his proposed programme budget for the biennium 1990-1991 on the basis of the total preliminary estímate of 1,767,060,000 United States dollars at 1988 rates (equivalent to 1,982,523,700 dollars at 1990-1991 rates) as shown in paragraph 16 of the report of the Advisory Committee on Administrative and Budgetary Questions; 14 6.