The FAA Regulatory Guidance Library (
RGL) archives historic CARs and FARs, including the edition of CAR 3 reissued on 15 May 1956 and subsequent amendments 3-1 through to 3-8. A handy map (
pdf) of CAR 3 from its inception in late 1945 up until recodification in 1965 as 14 CFRs 21 and 23 is listed as "1926 Act.pdf" (ie Air Commerce Act of 1926) under CAR 0.