(1) A benefit converted to a pension under regulation 79 is payable during the life of the pensioner and, except as otherwise provided by these regulations, is payable from whichever is the later.(a) in the case of a benefit payable under Part 5 , regulation 124 or Schedule 3 (i) the day after the date of retirement or death of the contributor; or(ii) the day after the date of the Board's final decision under regulation 126 ; or(b) in any other case, the date when an election to convert that benefit to a pension takes effect (2) Subregulation (1) does not apply to an interim pension payable under regulation 57 or 58 , an allocated pension or a child's pension.(3) A child's pension commences on the date of the event by virtue of which it becomes payable and ceases to be payable on whichever happens first.(a) the child attaining the age of 18 years unless subregulation (4) applies to the child; or(b) the death of the child; or(c) the cessation of the circumstances in respect of which it is payable (4) In the case of a child who is receiving full-time education at a school, college or university, the child's pension ceases to be payable whichever happens first.(a) when the child attains age 25 years; or(b) when the child ceases to receive full-time education at a school, college or university