(1) An increase payable by virtue of a provision of this Part, other than section 152, in the rate of a pension that was, or is, under subsection 148(4), to be treated as having been, payable to a person on 30 June or 31 December (as the case requires) in a half - year applies in relation to the instalment of pension falling due on the first pension pay day occurring after that day and in relation to all subsequent instalments.
(2) An increase payable by virtue of section 152 in the rate of a pension that was payable to or in respect of a person immediately before an anniversary of the person's birthday applies in relation to the instalment of pension falling due on the first pension pay day occurring after that anniversary and in relation to all subsequent instalments.