The Excess profits tax act, 1940. 4 Geo. VI, Ch. 32 (1940) (Second session) as amended by 4-5 Geo. VI, Ch. 15 (1940-41); 6 Geo. VI, Ch. 26 (1942); 7 Geo. VI, Ch. 13 (1943); 8 Geo. VI, Ch. 38Canada.1944EN