18Existing caravan sites with short term planning permission granted before commencement of this Act
Where an application for a site licence is made in respect of an existing site and—
(a)the existing site has at the date of the application the benefit of a permission for the use of the land as a caravan site granted under Part III of the Act of 1947 otherwise than by a development order, but
(b)the said permission was granted before the commencement of this Act and in terms such that it will expire within a period of six months beginning with the date of the application,
no account shall be taken of the said permission either for the purposes of section three of this Act or for the purposes of the last foregoing section; and the last foregoing section shall have effect in relation to the said application as if for the references in subsections (3) and (4) thereof to a period of six months beginning with the date on which the application is made there were substituted references to a period of six months beginning with the date on which the said permission will expire.