(1)A subscriber shall as soon as may be after joining the fund send to the Executive Officer a nomination conferring on one or more persons the right to receive the amount that may stand to his credit in the fund, in the event of his death before that amount has become payable or having become payable, has not been paid :Provided that if at the time of making the nomination, the subscriber has a family, the nomination shall not be in favour of any person or persons other than the members of his family.