7(1)Where, in the case of a relevant chargeable building, subsection (1) of the principal section would, apart from this paragraph, apply to an interest (not being the interest of a relevant person) which a person has in the relevant land on the material date, the following provisions of this paragraph shall apply if on that date any part of the relevant land is occupied by him in right of that interest.
(2)Subject to the following provisions of this paragraph, the said subsection (1) shall not apply to that interest of that person in so much of the relevant land as is on the material date occupied by him in right thereof.
(3)If before the end of the five-year period that person ceases to occupy any part of the relevant land, being a part in which he had an interest on the material date and to which the said subsection (1) would apply but for sub-paragraph (2) above, the said sub-paragraph (2) shall cease to apply to the interest which he had on that date in that part, and the said subsection (1) shall apply thereto accordingly.
(4)For the purposes of this paragraph a person who on any date occupies not less than 90 per cent, of the floor area of the relevant chargeable building shall be deemed to occupy on that date the whole, and not to have ceased on that date to occupy any part, of so much of the relevant land as is then subject to his interest (and references to occupation and ceasing to occupy shall be construed accordingly).