31 C.F.R. § 601.4 Use of paper; interest-bearing securities of the United States.
Title 31 - Money and Finance: Treasury
The existing distinctive papers shall be used for the printing of interest-bearing securities of the United States, and for any other printing where the use of distinctive paper is indicated.
Title 31: Money and Finance: Treasury
PART 601—DISTINCTIVE PAPER FOR UNITED STATES CURRENCY AND OTHER SECURITIES
§ 601.4 Use of paper; interest-bearing securities of the United States.