This legislation aims to restrict United States voluntary and assessed contributions to the United Nations, specifically concerning assistance provided in Afghanistan. It mandates that the U.S. may not make any such contributions until the Secretary of State issues a certification to appropriate congressional committees. The required certification must affirm three conditions: that no United States funds are used in cash shipments by the United Nations into Afghanistan, that no specially designated global terrorist organization receives funds from these shipments, and that no foreign terrorist organization benefits from such cash transfers. Should the Secretary later determine a certification to be inaccurate, it must be revoked, and a detailed justification provided to Congress.