大会对于重要问题的投票需要到场且投票的三分之二多数才能通过。重要问题的例子包括关于和平和安全的建议、主要机构的选举、接纳、暂停和开除会员，以及预算事宜<ref>[https://www.un.org/en/ga/about/ropga/plenary.shtml |title=General Assembly of the United Nations: Rules of Procedure: XII – Plenary Meetings |publisher=United Nations |accessdate=4 December 2013}} "Decisions of the General Assembly on important questions shall be made by a two-thirds majority of the members present and voting. These questions shall include: recommendations with respect to the maintenance of international peace and security, the election of the non-permanent members of the Security Council, the election of the members of the Economic and Social Council, the election of members of the Trusteeship Council in accordance with paragraph 1 c of Article 86 of the Charter, the admission of new Members to the United Nations, the suspension of the rights and privileges of membership, the expulsion of Members, questions relating to the operation of the trusteeship system, and budgetary questions.]</ref>。其他问题则由简单多数决定，每个国家只有一票。除预算事项外，通过的决议对于会员没有约束力。大会可以对联合国范围内的一切事项提出建议，但关于和平和安全的事项则属安全理事会考量。