29(1)No equipment of a description specified in a direction under this paragraph given by the Authority to Transport for London and every London borough council may be used in connection with a charging scheme unless the equipment is of a type approved by the Authority.
(2)Where the Secretary of State considers that—
(a)equipment of any particular description used in connection with a charging scheme (“the non-standard equipment”) is incompatible with a national standard for equipment of that or any other description, and
(b)the incompatibility is detrimental to the interests of persons resident in England outside Greater London,
he may give notice of that fact to the Authority.
(3)Where the Secretary of State has given notice under sub-paragraph (2) above to the Authority, the non-standard equipment may no longer be used in connection with a charging scheme except with the authorisation of the Secretary of State.
(4)Any authorisation under sub-paragraph (3) above may be given subject to conditions.
(5)Any authorisation under sub-paragraph (3) above, and any conditions under sub-paragraph (4) above, may be varied or revoked.
(6)In this paragraph “national standard” means any standard approved by the Secretary of State by regulations made under any enactment and in force in an area which consists of or includes the whole of England outside Greater London.