4.—(1) A person travelling by, present on, or leaving a train must, if required to do so by or on behalf of an operator, produce a valid travel ticket.
(2) A person present in or leaving a compulsory ticket area, other than as a result of leaving a train that arrived at that compulsory ticket area, must if required to do so by or on behalf of an operator produce—
(a)a valid travel ticket; or
(b)a platform ticket where that person does not intend to board a train for the purpose of travel.
(3) In paragraph (1) the reference to “an operator” is to the operator of—
(a)the train which the person in question is travelling by, present on or leaving;
(b)the station, where the person in question is present in or leaving a station, having left a train arriving at that station; or
(c)where the person in question is present in or leaving a compulsory ticket area, having left a train arriving at that compulsory ticket area—
(i)the station of which the compulsory ticket area forms part; or
(ii)any train that arrives at, or departs from, the compulsory ticket area.
(4) In paragraph (2) the reference to “an operator” is to the operator of—
(a)the station of which the compulsory ticket area forms part; or
(b)any train that arrives at, or departs from, the compulsory ticket area.