10 U.S.C. § 12605

(a) Presentation of Flag .— Upon the transfer from an active status or discharge of a Reserve who has completed the years of service required for eligibility for retired pay under chapter 1223 of this title, the Secretary concerned shall present a United States flag to the member. (b) Multiple Presentations Not Authorized .— A member is not eligible for presentation of a flag under subsection (a) if the member has previously been presented a flag under this section or any 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.