53.—(1) TfL must exercise its functions under this Part in accordance with the policies and procedures set out in the charging policy.
(2) TfL may revise the charging policy but only after it has—
(a)consulted in relation to the proposed changes to the charging policy—
(i)organisations it considers representative of regular users of the tunnels; and
(ii)the members of STIG;
(b)had regard to the responses to the consultation carried out under sub-paragraph (a); and
(c)submitted the proposed revised charging policy to the Mayor of London for approval.
(3) Any revised charging policy proposed by TfL will only have effect if it is approved by the Mayor of London, who may approve it with or without modifications.
(4) If the Mayor of London intends to approve a revised charging policy with material modifications, the Mayor of London must consult—
(a)organisations the Mayor considers representative of regular users of the tunnels; and
(b)the members of STIG,
on the proposed modifications and must have regard to any responses to the consultation received when deciding whether to approve a revised charging policy.