Each skater must:
(1) maintain reasonable control of his speed and course at all times to the extent he is able;
(2) comply with all properly posted signs and warnings and follow the reasonable instructions of the operator;
(3) wear skates only in areas designated by the operator;
(4) maintain a proper lookout to avoid other skaters and objects;
(5) accept responsibility for knowing the range of his own ability to negotiate the intended direction of travel while on skates and to skate within the limits of that ability; and
(6) refrain from acting in a manner which may cause or contribute to the injury of himself or any other person.