44 U.S.C. § 1709
The Public Printer may print for sale by the Superintendent of Documents to the public, upon prepayment, additional copies of approved Government blank forms.
(Pub. L. 90–620, , 82 Stat. 1280.)
Based on 44 U.S. Code, 1964 ed., § 94 (June 7, 1924, ch. 303, § 1, 43 Stat. 592).