(1)  The Rail Safety Regulator may, by written notice to a person, accept a written undertaking given by the person in connection with a matter relating to a contravention or alleged contravention by the person of the rail safety law.

(2)  The person may withdraw or vary the undertaking at any time but only with the Rail Safety Regulator's written consent.

(3)  Neither the Rail Safety Regulator nor a rail safety officer may bring proceedings for an offence against the rail safety law constituted by the contravention or alleged contravention to which the undertaking relates, unless the undertaking is withdrawn.