Explanation This book contains the rules and regulations of Title 26, Parts 40 to 169, revised as of January 1, 1966. It replaces the volume entitled "Title 26— Internal Revenue, Parts 40 to 169, Revised as of January 1, 1961," and The text in this revision is derived from the latest text of the rules and regulations, general and permanent in nature, duly promulgated on or be- fore December 31, 1965. All dates appearing in the source citations are dates of publication in the Federal Register and should not be construed as Current regulatory material appearing in the daily issues of the Federal Register follows the numbering system used herein, and serves as a daily sup- A compilation of the list of sections affected for the entire Code of Fed- This volume is published pursuant to Part 30 of the regulations of the Administrative Committee of the Federal Register revised December 7, 1965 (30 F.R. 15131; 1 CFR Part 30), under the authority contained in section 11 of the Federal Register Act (67 Stat. 388, as amended; 44 U.S.C. 311). The contents of the Federal Register and the Code of Federal Regulations are by law prima facie evidence of the text of the original documents and are required to be judicially noticed (49 Stat. 502, 67 Stat. 388; 44 U.S.C. 307, 311). The approved citation of the Code is "CFR." Thus the citation “26 |