(1)  A person who has given a biosecurity undertaking may, at any time, with the written agreement of an authorised officer –

(a) withdraw the undertaking; or

(b) vary the undertaking.

(2)  An authorised officer may, at any time –

(a) withdraw an authorised officer’s acceptance of a biosecurity undertaking, by written notice served on the person who gave the undertaking; or

(b) vary a biosecurity undertaking (but only with the written agreement of the person who gave the undertaking).

(3)  The provisions of a biosecurity undertaking may not be varied to provide for a different alleged contravention.

(4)  A biosecurity undertaking ceases to have effect if –

(a) it is withdrawn by the person who made it (in accordance with this section); or

(b) acceptance of the undertaking is withdrawn by an authorised officer.