It shall be the duty of each water supply licensee to provide the water undertaker with such information as the water undertaker may reasonably request for the purposes of preparing or revising its drought plan.
In the event of any dispute between a water undertaker and a water supply licensee as to the reasonableness of the water undertaker's request under subsection (1) above, either party may refer the matter for determination by the Secretary of State, and any such determination shall be final.
For the purposes of paragraph (b) of section 37B(1) above as applied by section 39B(5) above, the water undertaker shall identify in its statement under that paragraph any information—
which the water supply licensee has (at the time of providing it to the water undertaker) specifically identified as being, in the water supply licensee's opinion, commercially confidential.
The water undertaker shall not use any unpublished information save for the purpose of facilitating the performance by it of any of the duties imposed on it by or under this Act, any of the other consolidation Acts or the Water Act 1989.
In subsection (4) above—
The duties of a water supply licensee and a water undertaker under this section shall be enforceable by the Secretary of State under section 18 above.