; (2) commence preparing the subject guidebook and index to the Collection; and (3) establish criteria and acceptable formats for Executive agencies to follow when transmitting copies of Missing Armed Forces Personnel Records to the Archivist, to include required metadata. (b) Regulations Not later than 90 days after the date of the swearing in of the Board members, the Review Board shall promulgate rules to establish guidelines and processes for the disclosure of records contained in the Collection. 5. Review, identification, transmission to the National Archives, and public disclosure of Missing Armed Forces Personnel records by Government offices (a) In general (1) Preparation As soon as practicable after the date of enactment of this Act, and sufficiently in advance of the deadlines established under this Act, each Government office shall— (A) identify and locate any Missing Armed Forces Personnel records in the custody, possession, or control of the Government office; and (B) prepare for transmission to the Archivist in accordance with the criteria and acceptable formats established by the Archivist a copy of any Missing Armed Forces Personnel records that have not previously been transmitted to the Archivist by the Government office. (2) Certification Each Government office shall submit to the Archivist, under penalty of perjury, a certification indicating— (A) whether the Government office has conducted a thorough search for all Missing Armed Forces Personnel records in the custody, possession, or control of the Government office