What law requires that the president prepare the National Security Strategy for Congress?

The law that requires the president to prepare the National Security Strategy for Congress is the Goldwater-Nichols Department of Defense Reorganization Act of 1986. This legislation mandates that the president submit a comprehensive National Security Strategy report to Congress annually, outlining the nation's security interests, objectives, and the strategy to achieve them. This requirement aims to ensure accountability and transparency in U.S. national security policy.