To amend title 4, United States Code, to permit the flag of the United States to be flown at half-staff in the event of the death of the Mayor of the District of Columbia.

This bill amends U.S. Code Section 7(m) to add the Mayor of the District of Columbia to the list of officials whose death warrants flying the U.S. flag at half-staff. It directly affects the District of Columbia by extending this ceremonial protocol to the mayor, aligning the District's treatment with that of state governors. The key change modifies two specific sentences in the existing law to include "the Mayor of the District of Columbia" alongside governors of states and territories. This is a procedural update to flag protocol, not a substantive policy change.