19.—(1) Part III of the 1970 Act (other returns and information) shall apply for the purposes of establishing the amount of the repayment a borrower may be required to make under this Part as it applies for the purposes of establishing the amounts in which a person is chargeable to income tax.
(2) Section 19A of the 1970 Act (power to call for documents for purposes of certain enquiries) shall apply where an officer of the Board gives notice under section 9A(1) of that Act in relation to a self-assessment under regulation 16 of these Regulations as it applies to a self-assessment under section 9 of that Act.