Regulations under this Act may, in a case where a scheduled benefit becomes payable to a person who is entitled to, or is in receipt of, a Commonwealth pension –

(a) provide for the reduction of the benefit;

(b) provide that the benefit shall not be paid or shall not be paid in respect of a specified period;

(c) provide for the postponement of the payment of the benefit or any part thereof; or

(d) provide for the apportionment of any scheduled benefit to which that person may be entitled together with other persons.