36 CFR § 1270.24
When the Archivist may act for a President
November 4, 2020
If a President specifies restrictions on access to Presidential records under 44 U.S.C. 2204(a), but has not made a designation under §1270.22 at the time of their death or disability, the Archivist exercises the President's discretion or authority under 44 U.S.C. 2204, except as limited by 44 U.S.C. 2208 and §1270.48.