Where a pension benefit would, but for its suspension under section 35 of the Defence Force Retirement and Death Benefits Act, have been payable to a person immediately before 1 July 1974 or immediately before 1 July 1975, that pension benefit shall, for the purposes of this Part, be deemed to have been payable to that person immediately before whichever of those dates is relevant, but any increase in that pension benefit by virtue of this Part does not have effect in respect of any part of that period of suspension .