These sections enable councils to issue a hazardous substances contravention notice for a contravention of hazardous substances control. Service requirements and specifics to be contained within the notice are outlined in section 162. A notice can be withdrawn, and the Department is required to make regulations to cover appeals and may make further regulations as to the specific requirements of the notice. Section 163 allows a council to vary a notice which it has already issued, regardless of whether the notice has taken effect.