5.—(1) A person must not operate, obstruct, interfere with or stop any tunnel equipment except—
(a)by means of any of the controls intended for use by that person; or
(b)in an emergency and by means of equipment on or near which is a notice indicating that it is to be used in an emergency.
(2) A person must not place, throw, drop or trail anything which is capable of injuring or endangering any person or damaging any property in the tunnels areas.
(3) A person must not obstruct or in any way interfere with the tunnels areas.
(4) A person must not, without reasonable cause, activate, use or interfere with any emergency, safety or communications equipment within the tunnels areas.