9.—(1) The expenses incurred in the performance under section 111 of this Act of a function of a housing authority to the extent certified by the Minister to be properly payable by the authority, shall on demand be paid to the Minister, the housing authority or other person by whom the expenses were incurred and shall be recoverable by the person or authority making the demand as a simple contract debt in any court of competent jurisdiction.

(2) Where a sum is due to a housing authority by the Minister and, at the same time, expenses are recoverable under this section by the Minister from the authority, the sum may be set off against the expenses either, as may be appropriate, in whole or in part.