43. Where a pension or annual allowance becomes payable to a contributor, it shall, subject to the other provisions of this plan, be paid in accordance with section 148 of the provincial Act and shall continue to be paid for the contributor’s lifetime and, thereafter, until the end of the month of his death, and any amount in arrears remaining unpaid at any time after his death shall, in accordance with the provisions of this plan, be paid as though it were a refund of contributions.