12.—(1) Subject to paragraphs (2) to (5), a person may serve a blight notice on the appropriate authority under and in accordance with this Order where he claims that—
(a)he is entitled as mortgagee, by virtue of a power which has become exercisable, to sell an interest in a hereditament or agricultural unit comprised in land of any of the specified descriptions, giving immediate vacant possession of the land; and
(b)he has complied with the requirements specified in Article 5(1)(b) and (c) in relation to that interest.
(2) Article 5(2) applies to the interest of a mortgagee as it applies to an interest which qualifies for protection under Article 4.
(3) A mortgagee shall not serve a blight notice unless one or other of the following conditions is satisfied with regard to the interest which the mortgagee claims he has the power to sell, namely;—
(a)the interest could be the subject of a blight notice under Article 5 served by the person entitled thereto on the date of service of a notice under this Article; or
(b)the interest could have been the subject of such a notice by that person on a date not more than six months before the date of service of a notice under this Article.
(4) No blight notice under this Article shall be served in respect of a hereditament or agricultural unit, or any part of a hereditament or agricultural unit at a time when a notice already served under Article 5 is outstanding in respect of that hereditament, unit or part; and no notice shall be so served under Article 5 when a notice under the Article is so outstanding.
(5) For the purposes of paragraph (4), a blight notice shall be treated as outstanding until—
(a)it is withdrawn; or
(b)an objection to the notice having been made by a counter-notice under Article 6 either—
(i)the period of two months specified in Article 7 elapses without the claimant having required the objection to be referred to the Lands Tribunal; or
(ii)the objection, having been referred to the Lands Tribunal, is upheld by the Tribunal.