73—(1) A person who makes a claim shall furnish such certificates, documents, information and evidence in connection with the claim, or any question arising out of it, as may be reasonably required by the appropriate authority in order to determine that person’s entitlement to housing benefit, and shall do so within 4 weeks of being required to do so or such longer period as the appropriate authority may consider reasonable.
(2) Where a request is made under paragraph (1), the appropriate authority shall–
(a)inform the claimant of his duty under regulation 75 (duty to notify change of circumstances) to notify the designated office of any change of circumstances; and
(b)without prejudice to the extent of the duty owed under regulation 75, indicate to him either orally or by notice or by reference to some other document available to him on application and without charge, the kind of change or circumstances which is to be notified.