The "Safeguarding the Use of the National Guard Act," or the SUN Act , establishes new congressional oversight requirements for the domestic deployment of the National Guard. It mandates that within 15 days of deploying the National Guard within the United States under certain authorities, the President must submit a comprehensive report to Congress. This report must detail the precise legal basis and goals for the deployment, including substantiating evidence, and describe its effect on the identified situation. It also requires reports from local and State law enforcement agencies regarding interactions between Guard members and civilians, particularly concerning violence or threats, along with an estimate of the total federal cost . Finally, the President must certify that the deployment will not hinder the Armed Forces' ability to respond to potential disasters under the Stafford Act, with an exception for deployments related to natural disasters or weather-related events.