The Agencyor the Natural Resources Body for Wales may enter into an agreement with any internal drainage board for the carrying out by the board, on such terms as to payment or otherwise as may be specified in the agreement, of any work in connection with a main river which the Agencyor the Natural Resources Body for Wales is authorised to carry out.
Notwithstanding any restriction by reference to a main river of the powers conferred on the appropriate supervisory body by section 165 of the Water Resources Act 1991, the appropriate supervisory body may—
An internal drainage board may—
Any expense incurred by an internal drainage board under subsection (3) above shall be defrayed as if the expense had been incurred in their own district.
Two internal drainage boards may agree that one is to provide administrative, professional or technical services for the other.