Section 1.806-1 is applicable only to taxable years beginning after December 31, 1953, and before January 1, 1955, and all references to sections of part I, subchapter L, chapter 1 of the Code are to the Internal Revenue Code of 1954, before amendments. Sections 1.806-3 and 1.806-4 are applicable only to taxable years beginning after December 31, 1957, and all references to sections of part I, subchapter L, chapter 1 of the Code are to the Internal Revenue Code of 1954, as amended by the Life Insurance Company Income Tax Act of 1959 (73 Stat. 112). [T.D. 6513, 25 FR 12668, Dec. 10, 1960]