; and (2) transmit to the Archivist upon approval for postponement by the Review Board or upon completion of other action authorized by this Act, each cold case record for which public disclosure has been postponed, in whole or in part, under the standards of this Act, to become part of the protected Collection. (f) Custody of postponed cold case records A cold case record for which public disclosure has been postponed shall, pending transmission to the Archivist, be held for reasons of security and preservation by the originating body until such time as the information security program has been established at the National Archives as required in section 4(c)(2). (g) Periodic review of postponed cold case records (1) In general Each postponed or redacted record shall be reviewed every 180 days by the originating agency and the Archivist consistent with the recommendations of the Review Board under section 8(c)(3)(B). (2) Requirements of periodic review The periodic review shall— (A) address the public disclosure of additional cold case records in the Collection under the standards of this Act; and (B) serve to downgrade and declassify classified information, with the presumption of providing public disclosure. (3) Unclassified written description Any postponed cold case record that is determined to require continued postponement shall include an unclassified written description of the reason for such continued postponement. Such description shall be provided to the Archivist and published in the Federal Register upon determination. (4) Full disclosure of cold case record required Each cold case record shall be publicly disclosed in full, and available in the Collection not later than 25 years after the date of enactment of this Act unless— (A) continued postponement is made necessary by an identifiable harm to military defense, intelligence operations, or the conduct of foreign relations