The Parliamentarian of the House of Representatives, at the beginning of the fifth fiscal year following the completion and publication of the parliamentary precedents of the House authorized by the Legislative Branch Appropriation Act, 1966 (
79 Stat. 270; Public Law 89–90), and at the beginning of each fifth fiscal year thereafter, shall commence the compilation and preparation for printing of the parliamentary precedents of the House of Representatives, together with such other materials as may be useful in connection therewith, and an index digest of such precedents and other materials. Each such compilation and preparation for printing of the parliamentary precedents of the House shall be completed by the close of the fiscal year immediately following the fiscal year in which such work is commenced.