71. Except as provided by regulations, nothing in this Part applies in relation to harm, or pollution of waterways or underground strata, so far as attributable to any radioactivity possessed by any substance; but regulations may—
(a)provide for prescribed provisions of this Part to have effect with such modifications as the Department considers appropriate for the purpose of dealing with harm, or pollution of waterways or underground strata, so far as attributable to any radioactivity possessed by any substances; or
(b)make such modifications of the [1993 c. 12.] Radioactive Substances Act 1993 or any other statutory provision as the Department considers appropriate.