52.—(1) For the avoidance of doubt—

(a) in determining, under a provision of this Act, the value of land or a building which is used, temporarily or permanently, for the exhibition of advertisements, the use of the land or building for that purpose shall not be taken into account if such use is made pursuant to a right that exists, separately from the land or building, to make use of the land or building for that purpose,

(b) if land or a building is solely used, temporarily or permanently, for the exhibition of advertisements and such use is not prevented by paragraph (a) from being taken account of in determining, under a provision of this Act, the value of the land or building, then, if the land or building is not occupied for any other purpose, regard shall be had, in making that determination, solely to the fact of its being used for that purpose.

(2) References in this section to land or a building being used for the exhibition of advertisements shall be construed as including references to land or a building being used for the erection of any structure used for the exhibition of advertisements.