12.—(1) A person commits an offence if that person contravenes, or causes or permits a person to contravene, a relevant provision.
(2) A person commits an offence if that person fails to comply with a compliance notice served under regulation 8.
(3) But it is a defence for a person charged with an offence under paragraph (1) or (2) to prove that the person took all reasonable precautions and exercised all due diligence to avoid the commission of the offence.