10 U.S.C. § 9251

(a) Presentation of Flag .— Upon the release of a member of the Air Force or the Space Force from active duty for retirement, the Secretary of the Air Force shall present a United States flag to the member. (b) Multiple Presentations Not Authorized .— A member is not eligible for a presentation of a flag under subsection (a) if the member has previously been presented a flag under this section or any other provision of law providing for the presentation of a United States flag incident to release from active service for retirement. (c) No Cost to Recipient .— The presentation of a flag under this section shall be at no cost to the recipient.