In this Act, unless the context otherwise requires,

(31). "person-in-charge" means, -

(a) in relation to a vessel, the master of the vessel;

(b) in relation to an aircraft, the commander or pilot-in-charge of the aircraft;

(c) in relation to a railway train, the conductor, guard or other person having the chief direction of the train;

(d) in relation to any other conveyance, the driver or other person-in-charge of the conveyance;