Binding for the departments of the Government shall be done in plain sheep or cloth, except that record and account books may be bound in Russia leather, sheep fleshers, and skivers, when authorized by the head of a department. The libraries of the several departments, the Library of Congress , the libraries of the Surgeon General’s Office, and the Naval Observatory may have books for the exclusive use of these libraries bound in half Turkey, or material no more expensive. ( Pub. L. 90–620 , Oct. 22, 1968 , 82 Stat. 1264 ; Pub. L. 106–113, div. B, § 1000(a)(9) [title IV, § 4732(b)(24)] , Nov. 29, 1999 , 113 Stat. 1536 , 1501A–585.) Historical and Revision Notes Based on 44 U.S. C ode, 1964 ed., § 116 (Jan. 12, 1895, ch. 23, § 86, 28 Stat. 622 ). This section incorporates all but the first sentence of former section 116. The balance will be found in section 501 of the revision. Editorial Notes Amendments 1999— Pub. L. 106–113 struck out “the Patent Office,” after “the Surgeon General’s Office,”. Statutory Notes and Related Subsidiaries Effective Date of 1999 Amendment Amendment by Pub. L. 106–113 effective 4 months after Nov. 29, 1999 , see section 1000(a)(9) [title IV, § 4731] of Pub. L. 106–113 , set out as a note under section 1 of Title 35 , Patents.