Decides also, as an ad hoc arrangement, taking into consideration the funding through voluntary contributions from the Government of Kuwait of the two-thirds share of the cost of the Observation Mission, equivalent to 33,066,200 dollars, to apportion among Member States the amount of 18,421,300 dollars gross (16,533,100 dollars net), representing one third of the cost of the maintenance of the Observation Mission for the period from 1 July 1997 to 30 June 1998, the said amount to be assessed at a monthly rate of 1,535,108 dollars gross (1,377,758 dollars net), in accordance with the composition of groups set out in paragraphs 3 and 4 of General Assembly resolution 43/232 of 1 March 1989, as adjusted by the Assembly in its resolutions 44/192 B of 21 December 1989, 45/269 of 27 August 1991, 46/198 A of 20 December 1991, 47/218 A of 23 December 1992, 49/249 A of 20 July 1995, 49/249 B of 14 September 1995, 50/224 of 11 April 1996 and 51/218 A and B of 18 December 1996 and its decisions 48/472 A of 23 December 1993 and 50/451 B of 23 December 1995, and taking into account the scale of assessments for the year 1997, as set out in its resolution 49/19 B of 23 December 1994 and its decision 50/471 A of 23 December 1995, and for the year 1998, subject to the review by the Security Council with regard to the question of termination or continuation of the Observation Mission;