(1) An occupier may by express agreement or notice extend his or her duty towards entrants under sections 3 and 4.

(2)

(a) Subject to this section and to section 8, an occupier may by express agreement or notice restrict, modify or exclude his or her duty towards visitors under section 3.

(b) Such a restriction, modification or exclusion shall not bind a visitor unless -

(i) it is reasonable in all the circumstances, and

(ii) in case the occupier purports by notice to so restrict, modify or exclude that duty, the occupier has taken reasonable steps to bring the notice to the attention of the visitor.

(c) For the purposes of paragraph (b)(ii) an occupier shall be presumed, unless the contrary is shown, to have taken reasonable steps to bring a notice to the attention of a visitor if it is prominently displayed at the normal means of access to the premises.