(1) Subject to subsections (2) and (3), where the Executive makes an order under section 14B(1) or 17(2) which relates to an interest in land the subject of a joint tenancy, notwithstanding any rule of law or statutory provision -

(a) the mortgage created thereby shall not, by reason of the absence of the prior consent in writing of the other joint tenant or, where there are more than one other, all the other joint tenants, cause the severance of the joint tenancy in the interest in the land the subject of the mortgage,

(b) the mortgage created thereby shall not, by reason of the absence of the prior consent in writing of the other joint tenant or, where there are more than one other, all the other joint tenants, be void, and

(c) the severance of the joint tenancy, or the determination or extinguishment of the interest of the joint tenant who has created such mortgage, shall not cause the charge concerned to be determined, extinguished or otherwise cease to have effect as respects such land.