The United Nations Committee on the Peaceful uses of Outer Space issues its own Rules of Procedure:
«The Committee on the Peaceful Uses of Outer Space is a subsidiary organ of the United Nations General Assembly, established by General Assembly resolution 1472 (XIV) of 12 December 1959. In accordance with Article 22 of the United Nations Charter, which is restated also in Rule 161 of the Rules of Procedure of the General Assembly “the General Assembly may establish such subsidiary organs as it deems necessary for the performance of its functions”. Further, Rule 161 of the Rules of Procedure of the General Assembly establishes that “the rules relating to the procedure of committees of the General Assembly … shall apply to the procedure of any subsidiary organ unless the Assembly or the subsidiary organ decides otherwise.” «
More information: here.