12(1)Until provision is made by an order under section 10(6) prescribing the descriptions of equitable interests in land which may be taken as security for advances secured on land, building societies may advance money on the security of an equitable interest in land in England and Wales or Northern Ireland in addition to a mortgage of the freehold or leasehold estate where the lease or a related instrument includes provision entitling the leaseholder to acquire a beneficial interest of any extent in the freehold or a greater leasehold interest and the right to acquire that interest is assigned as additional security.
(2)Until such provision is made, section 17(10) shall have effect with the substitution of a reference to an equitable interest of the description specified in sub-paragraph (1) above for the reference to an equitable interest specified in an order under section 10(6).
(3)On the making of the first order under section 10(6) this paragraph shall cease to have effect.