NARA - National Archives and Records Administration generally operates the Presidential Museums, contracting out services.
YMMV as to if they use FEDERAL Frequencies or Business Band
Here in Boston it's a mix of Part 90, Part 95 and Federal 'A' band
Security (Contract) is A Band
Cleaning is Part 90
Concessions/Catering are Part 95
Does anyone have the frequency for the Ford Museum. They use Miller Protection Services out of Detroit.