Section 16 Duty to have regard to river basin management plans and sub-basin plansI1

the river basin management plan for that district as approved under section 13,

so far as the exercise of the functions affects an area of the district determined in pursuance of section 15(1)(a), the sub-basin plan prepared for that area, and

so far as relevant, any sub-basin plan prepared under section 15(1)(b) for the purpose of supplementing the river basin management plan for the district.