16.—(1) Where the residential property is subject to one or more subsisting mortgages, the Board may, as a condition for the withdrawal of money under these Regulations, require the member to satisfy the Board that the mortgagees have consented —
(a)
to the postponement of their mortgages according priority to the Board in respect of all withdrawals authorised by the Board in such manner and on such terms as may be agreed upon between the Board and the mortgagees; and
(b)
to obtain the prior written approval of the Board before they sell, sub-mortgage, transfer their mortgage or apply to the Court for an order to foreclose the residential property.
(2) Where a residential property is purchased or inherited or owned by 2 or more persons, the Board may, on or after 21st January 1984, as a condition for the withdrawal of money by any one of them under these Regulations, require all the co-purchasers or co-owners to give their written consent to extend any charge under section 21(1A) of the Act to all their respective estates or interests in the residential property.