Protection of the Environment Operations Act 1997 No 156
Current version for 14 May 2020 to date (accessed 15 July 2020 at 17:51)
142B   Defence of authority conferred by regulation
(1)  The regulations may, for the purposes of this Division, regulate the carrying out of an activity that pollutes land.
(2)  It is a defence in proceedings for an offence under this Division if the person establishes that—
(a)  the pollution resulted from an activity regulated by such a regulation, and
(b)  the requirements of that regulation were not contravened.