If a policy matures or otherwise falls due for payment during the currency of its assignment, the Central Board or, where so authorised by the Central Board, the Commissioner, shall realise the amount assured together with bonus, if any, accrued thereon, place to the credit of the member the amount so realised, or the whole of the amount paid form the Fund in respect of the policy with interest therein, whichever is less, and refund the balance, if any,to the member.