This bill amends the National Defense Authorization Act for Fiscal Year 2016 to establish a rebuttable presumption allowing members of the Armed Forces to carry their personal firearms on military installations. This presumption applies specifically when a member is on the installation but not performing official duty . Should authorization be denied, the decision must be provided in writing . The written denial must also include an objective, clearly describable, and individualized basis for the refusal, ensuring transparency and accountability in the authorization process.