; (5) recent changes in the national security environment require that the professional military education enterprise adapt to prepare the joint force to successfully defend American interests in evolving areas of strategic competition; and (6) the Department of Defense must transform the professional military education enterprise to meet these challenges by emphasizing focused and rigorous intellectual study reflecting the hard won strategic insights of history, while leveraging advancements in the modern learning environment. (b) Limitation None of the funds authorized to be appropriated by this Act or otherwise made available for fiscal year 2021 for the Department of Defense may be obligated or expended to consolidate, close, or significantly change the curriculum of the National Defense University or any institution of professional military education of an Armed Force until a period of 120 days has elapsed following the date on which the Under Secretary of Defense for Personnel and Readiness submits the report required under subsection (c). (c) Report required (1) In general Not later than 180 days after the date of the enactment of this Act, the Secretary of Defense, acting through the Under Secretary of Defense for Personnel and Readiness, shall submit to the Committees on Armed Services of the Senate and the House of Representatives a report on the status of the professional military education enterprise. (2) Elements The report required under paragraph (1) shall include the following: (A) A consolidated summary that— (i) lists all components of the professional military education enterprise of the Department of Defense, including all associated schools, programs, research centers, and support activities