80Cancellation of invalid supply authorities—Act,

80 Cancellation of invalid supply authorities—Act, s 30 (2) (d) (1) A paper-based supply authority is cancelled by a person if the person— (a) marks the word ‘cancelled’, and the person’s name and business address, on the front of the supply authority; and (b) signs and dates the cancellation of the supply authority. (2) An electronic supply authority is cancelled by a person if the person— (a) marks the word ‘cancelled’ on the supply authority; and (b) links an electronic document to the supply authority that includes the person’s name and business address and signature.