(1) Every claimant or beneficiary and every person by whom any benefit or medical care payment is receivable on behalf of a claimant or beneficiary shall -

(a) furnish in such manner and at such times as an officer of the Minister may determine, such certificates, documents and information affecting the right to benefit or medical care payment or to the receipt thereof as the said officer may require, and

(b) notify the Minister of any change in circumstances which affects the right to benefit or medical care payment, or to the receipt thereof, as soon as is reasonably practicable thereafter.

(2) Where any sum is receivable on account of an increase of benefit or medical care payment in respect of a qualified adult the beneficiary shall, in such cases or classes of cases as the Minister may direct, furnish a declaration signed by such qualified adult confirming the particulars in respect of him or her furnished by the claimant.