Section 449 of the Principal Act is hereby amended, in subsection (1), in the definition of "relevant foreign tax" -
(a) in paragraph (c), by the deletion of "and",
(b) in paragraph (d), by the substitution for "Schedule 24;" of "Schedule 24, and", and
(c) by the addition, after paragraph (d), of the following paragraph:
"(e) which is not treated under Schedule 24 as reducing the amount of any income;".