To designate the facility of the United States Postal Service located at 400 Whitehead Street in Key West, Florida, as the "Jimmy Buffett Post Office Building".

This bill is a procedural naming resolution that designates a specific U.S. Postal Service facility in Key West, Florida (at 400 Whitehead Street) as the "Jimmy Buffett Post Office Building." It directly affects the postal facility and all official references to it in government documents. The key provision requires all federal laws, maps, regulations, and records to update their references to this location to the new name. This is a symbolic honorific designation with no policy or funding changes.