31 U.S. Code § 5117.Transferring gold and gold certificates

(a)All right, title, and interest, and every claim of the Board of Governors of the Federal Reserve System, a Federal reserve bank, and a Federal reserve agent, in and to gold is transferred to and vests in the United States Government to be held in the Treasury. Payment for the transferred gold is made by crediting equivalent amounts in dollars in accounts established in the Treasury under the 15th paragraph of section 16 of the Federal Reserve Act (12 U.S.C. 467). Gold not in the possession of the Government shall be held in custody for the Government and delivered on the order of the Secretary of the Treasury. The Board of Governors, Federal reserve banks, and Federal reserve agents shall give instructions and take action necessary to ensure that the gold is so held and delivered.

(b)The Secretary shall issue gold certificates against gold transferred under subsection (a) of this section. The Secretary may issue gold certificates against other gold held in the Treasury. The Secretary may prescribe the form and denominations of the certificates. The amount of outstanding certificates may be not more than the value (for the purpose of issuing those certificates, of 42 and two-ninths dollars a fine troy ounce) of the gold held against gold certificates. The Secretary shall hold gold in the Treasury equal to the required dollar amount as security for gold certificates issued after January 29, 1934.

(c)With the approval of the President, the Secretary may prescribe regulations the Secretary considers necessary to carry out this section.

Via https://www.law.cornell.edu/uscode/text/31/5117