In this Part:
"contaminated land" means land in, on or under which any substance is present at a concentration above the concentration at which the substance is normally present in, on or under (respectively) land in the same locality, being a presence that presents a risk of harm to human health or any other aspect of the environment.
"contaminated land planning guidelines" means guidelines notified in accordance with section 145C.
"planning authority" , in relation to a function specified in section 145B, means:
(a) in the case of a function relating to a development application-the consent authority (or a person or body taken to be a consent authority), and
(a1) in the case of a function relating to an application for a complying development certificate-the council or accredited certifier to whom the application is made, and
(b) in the case of any other function-the public authority or other person responsible for exercising the function.