4.—(1) Where an interest acquired in pursuance of Article 9 is or includes a dwelling in relation to which a grant has been paid under Part III of the Order of 1983—N.I.
(a)any conditions imposed under or by virtue of that Part as conditions of the grant shall cease to be in force with respect to the dwelling with effect from the time of disposal of the interest, and
(b)the owner for the time being of the dwelling shall not be liable to make in relation to the grant any payment under any grant condition made under Article 69(2)(c) of the Order of 1983 unless the liability to do so arises from a demand made before the time of disposal of the interest.
(2) In sub-paragraph (1)—
(a)“dwelling” means a house as defined in Article 2(2) of the Order of 1981, and
(b)owner has the same meaning as in that Article.