No Nuclear Testing Without Approval Act

This bill requires the U.S. government to obtain congressional approval before conducting any explosive nuclear testing, directly affecting the President and Defense Department. It mandates that the President submit a detailed 180-day notice to Congress - including reasons for testing, alternatives considered, and state engagement - before proceeding. Congress must then pass a joint resolution with a two-thirds vote in both chambers to approve testing for "technical need" (e.g., nuclear weapon safety), or if another country tests first. The bill explicitly excludes subcritical experiments and fusion tests from the definition of "explosive nuclear testing."