The Authority may issue rules about charges schemes under section 143.
Rules under this section may in particular—
The rules may provide for the reduction of charges under a charges scheme where conditions specified by the rules are satisfied.
Rules made by virtue of subsection (3) may in particular specify conditions about—
The provisions of charges schemes must comply with rules issued under this section.
The rules may make different provision for different cases, including different provision in relation to different, or different descriptions of, persons, circumstances or localities.
The power to make rules under this section may not be exercised for the purpose of limiting the total revenues of relevant undertakers from charges fixed by or in accordance with charges schemes.
The Authority may from time to time revise rules issued under this section and issue revised rules.
The Authority must issue revised rules if—
Revised rules may include provision for applying any of their revisions to charges schemes under section 143 made before the revised rules come into effect.