(1) The obligation to comply with section 77(2) or (3) or 78(2) or paragraph 7(2) or (3) or 8(2) of Schedule 7 shall be a duty owed to any person who may be affected by a contravention of the enactment concerned.

(2) Any breach of the duty which causes such a person to sustain loss or damage shall be actionable by him.

(3) In any proceedings brought under subsection (2) against a person who has an obligation to comply with section 77(2) or (3) or 78(2) or paragraph 7(2) or (3) or 8(2) of Schedule 7 it shall be a defence for that person to show that he took all reasonable steps and exercised all due diligence to avoid contravening the enactment concerned.