7.—(1) Where one spouse is entitled by virtue of Article 5 to a registrable matrimonial charge in respect of each of two or more dwelling-houses, only one of the charges to which that spouse is so entitled shall be effectively registered under Article 6 at any one time.
(2) The registration of a matrimonial charge, in respect of any dwelling-house, in favour of one spouse shall cease to have effect upon the registration of a matrimonial charge, in respect of any other dwelling-house, in favour of that spouse.
(3) A spouse applying for registration of a matrimonial charge shall notify the registrar to whom the application is made, of any subsisting registered matrimonial charge in respect of matrimonial home rights to which that spouse is entitled.
(4) The Department of the Environment may make regulations prescribing the circumstances and manner in which the registration of a matrimonial charge which has ceased to have effect by virtue of paragraph (2) shall be cancelled.