68Notwithstanding Part I of this Schedule, the following provisions of this Act, that is to say, sections 157(4), 158(3)(c) and (6), in section 169(2) the words "or which would contravene the condition set out in Schedule 16 to this Act", section 169(3), section 263(1) to (4), paragraph 14 of Schedule 6 and Schedule 16 do not affect—
(a)any determination arising out of a notice to treat served before 25th February 1963, or served at any time in respect of a purchase notice or notice under section 38(2) of the Act of 1959 (or any corresponding enactment previously in force) which was served before that date;
(b)any other determination under the Act of 1947 in respect of or arising out of a purchase notice served before that date;
(c)any claim for compensation under section 18(1) or 20 of the Act of 1947 (or any corresponding enactment previously in force) which arose before that date.