(1) A person may give to the regulator—
(a) a statement of the procedures to be used for the testing by the person of meters; or
(b) a written request that the procedures be changed in the way stated in the request.
(2) The regulator may approve, or refuse to approve, the procedures or a change to the procedures.
(3) An approval must be in writing.
(4) An approval must not be given if the procedures, or change to procedures, would contravene regulation 21.