23. Section 39 of the principal enactment is hereby amended in subsection (1) of that section as follows : -
(1) by the substitution, for paragraph (c) of that subsection, of the following new paragraph : -
| | "(c) at the rate or rates specified in Part I of the Sixth Schedule to. this Act, for every year of assessment commencing on or after April 1, 1965, but prior to April 1, 1978; and "; and | | |
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(2) by the addition, at the end of that subsection, of the following new paragraph :-
| | "(d) at the rate or rates specified in Part II of the Sixth Schedule to this Act, for every year of assessment commencing on or after April 1, 1978. ". | | |
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