16. Schedule 2, and the exceptions from, and modifications to, the Act made by it, has effect in relation to—
(a)proposals for abstraction or impounding by the Agency for which an abstraction licence or impounding licence is required; and
(b)proposals under section 51(2) (which provides for the variation of an abstraction licence or an impounding licence on the application of a licence holder) (modified in accordance with regulation 18) in relation to a licence held by the Agency, other than where section 51(4) applies.