Member may not mortgage without permission of Board
25.—(1)  As long as any money withdrawn remains payable to the Fund under regulation 26, the member shall not mortgage or in any way encumber the residential property in respect of which the withdrawal had been made without the prior written permission of the Board.
(2)  In granting any permission under paragraph (1), the Board may —
(a)require the member to make adequate arrangements to secure the repayment into the member’s account in the Fund of all moneys withdrawn by him and of such interest as would have accrued thereto if the withdrawal had not been made; or
(b)impose such other terms and conditions as the Board may think fit.