Section 1260.70 - How does a researcher submit an MDR request?(a) For Federal records in NARA's physical and legal custody, requests for MDR should be submitted to: National Archives at College Park, ANDC (Attn: MDR Staff), 8601 Adelphi Road, Room 2600, College Park MD 20740 or specialaccess_foia@nara.gov;(b) For Presidential records, Nixon Presidential materials, or donated presidential materials in the custody of the Presidential Libraries, MDR requests should be submitted to the Presidential Library with physical and legal custody of the records;(c) For Congressional records in NARA's custody, MDR requests should be submitted to: The Center for Legislative Archives, 700 Pennsylvania Ave. NW., Washington, DC 20408 or legislative.archives@nara.gov.(d) For all records in NARA's physical and legal custody, MDR requests must describe the record or material with sufficient specificity to enable NARA to locate it with a reasonable amount of effort. If NARA is unable to locate the record or material, or requires additional information, NARA will inform the requester.