44 U.S.C. § 736
The Public Printer may bind at the Government Printing Office books, maps, charts, or documents published by authority of Congress, upon application of a Member of Congress, and payment of the actual cost of binding.
(Pub. L. 90–620, , 82 Stat. 1254.)
Based on 44 U.S. Code, 1964 ed., § 171 (Dec. 10, 1877, ch. 6, 20 Stat. 5).