41.Subsection (1) of section 25 enables the Commissioner to vary a compliance notice to allow more time for compliance or, with the consent of the person to whom the compliance notice was issued, to change the steps that are required to be taken. Subsection (2) clarifies that a compliance notice can only be varied before the deadline for taking the steps specified in the compliance notice has passed. This prevents a compliance notice from being modified retrospectively, after the deadline for compliance with it has already passed. Subsection (3) specifies how in practice the Commissioner can vary a compliance notice.