(1) The Secretary may determine that, for the purposes of the social security law, a person is taken to have made a claim for an income support payment (the new payment ), if:
(a) the person became qualified for the new payment while receiving another income support payment; or
(b) the person became qualified for the new payment immediately after ceasing to receive another income support payment.
(2) The person is taken to have made the claim for the new payment on the day specified in the Secretary's determination. That day must not be earlier than:
(a) the day that is 13 weeks before the day on which the Secretary's determination is made; or
(b) if the person became qualified for the new payment after the day referred to in paragraph (a)--the day on which the person became qualified for the new payment.