23.This section provides for the variation or revocation of QP schemes. This will give flexibility both for future changes and for any circumstances where it may be necessary to revoke a scheme. The local transport authority may revoke a scheme before its end date, but only if all participating operators consent. Consent cannot be unreasonably withheld. If a variation requires the making of a traffic regulation order, then the variation will be subject to the procedures set out in section 5 and 6 of the Act. Unless modified by regulations made under section 11 any other variation or revocation is also subject to the procedures set out in sections 5 and 6.