16.—(1) The Agency may prepare supplementary plans for the purposes of supplementing the river basin management plan for a river basin district.
(2) A plan prepared under paragraph (1) may, for example, relate to—
(a)a particular description of body of water;
(b)a particular catchment or geographical area;
(c)a particular matter relating to, or aspect of, the water environment; or
(d)a particular description of user of water resources.
(3) The Agency must, in relation to the preparation of a supplementary plan, consult such of the persons referred to in regulation 12(4) and such other persons likely to be interested in or affected by that plan as it thinks fit, and must take into account any views expressed by those consulted.