; (2) in subsection (e), by adding at the end the following new paragraph: (4) Updated guidance (A) In general Not later than 270 days after the date of the enactment of this paragraph, and biannually thereafter through fiscal year 2028, the Secretary of Defense, in coordination with the Secretary of State, shall issue updated guidance for the execution and administration of the Program. (B) Scope The updated guidance required by subparagraph (A) shall— (i) fulfill each requirement set forth in paragraph (3), as appropriate; and (ii) include an identification of the manner in which the Department of Defense shall ensure that personnel assigned to security cooperation offices within embassies of the United States are trained and managed to a level of proficiency that is at least equal to the level of proficiency provided to the attaché workforce by the Defense Attaché Service. ; (3) by redesignating subsections (f) through (h) as subsections (h) through (j), respectively; and (4) by inserting after subsection (e) the following new subsections (f) and (g): (f) Foreign Military Sales Center of Excellence (1) Establishment The Secretary of Defense shall direct an existing schoolhouse within the Department of Defense to serve as a Foreign Military Sales Center of Excellence to improve the training and education of personnel engaged in foreign military sales planning and execution. (2) Objectives The objectives of the Foreign Military Sales Center of Excellence shall include— (A) conducting research on and promoting best practices for ensuring that foreign military sales are timely and effective