43.—(1) Subject to Articles 12(1)(i) and 23(7), this Order binds the Crown and, consequently, the Order applies where there is an estate belonging to Her Majesty in right of the Crown or belonging to a department of the Government of the United Kingdom or of the Government of Northern Ireland or held on behalf of Her Majesty for the purposes of any such department, in like manner as if that estate were an estate not so belonging or held.
(2) Where a tenancy is held by or on behalf of a department of the Government of the United Kingdom or of the Government of Northern Ireland and the property comprised therein is or includes premises occupied for any purposes of any such department, the tenancy is one to which this Order applies; and for the purposes of any provision of this Order which is applicable only if either or both of the following conditions are satisfied, that is to say—
(a)that the premises have during any period been occupied for the purposes of the tenant’s business;
(b)that on any change of occupier of any premises the new occupier succeeded to the business of the former occupier,
those conditions are to be deemed to be satisfied respectively, in relation to such a tenancy, if during that period or, as the case may be, immediately before and immediately after the change, the premises were occupied for the purposes of any such department.