The Military Lodging Reform Act of 2023 reorganizes how the Department of Defense manages temporary military housing by transferring responsibility from the Under Secretary of Defense for Personnel and Readiness to the Assistant Secretary of Defense for Energy, Installations, and Environment. This change affects all military lodging used by service members on temporary duty assignments or when relocating due to permanent change of station orders. The Secretary of Defense must complete the transfer of all related duties and responsibilities within 90 days of the bill's enactment and submit certification to Congress within 180 days confirming the transfer is complete. The Assistant Secretary will coordinate with corresponding officials in the Army, Navy, and Air Force departments to manage their respective transient housing programs. The bill aims to consolidate military housing operations under a single office focused on installations and infrastructure management.