An Act Establishing The Gross Income System Of Taxation For Income Derived From Trade Or Business Or From The Exercise Of A Profession Or Vocation, Amending For The Purpose Sections 21 (A); 22(A) (1);

An Act Establishing The Gross Income System Of Taxation For Income Derived From Trade Or Business Or From The Exercise Of A Profession Or Vocation, Amending For The Purpose Sections 21 (A); 22(A) (1); 23; 24(A), (B) And (C); 25 (A) (1); 27; 28; 29 And 30 Of The National Internal Revenue Code Of The