11—(1) This Part applies to any agreement (whether made before or after commencement) under which a person is entitled—
(a)to station a caravan on a protected site and occupy it as that person's only or main residence; or
(b)to occupy as that person's only or main residence a caravan stationed on a protected site.
(2) In this Part—
“residential agreement” means an agreement to which this Part applies;
“occupier” means the person entitled as mentioned in subsection (1)(a) or (b).