These are a form of delegated legislation to which special parliamentary procedure applies. Part of this procedure gives those people or bodies who are especially affected by the order to petition against it to either House. If successful, such petitions are heard by a Joint Committee consisting of Members from both Houses.
Special Procedure Orders currently in progress through Parliament
A Special Procedure Order concerning the proposed construction of a resource recovery facility near Stewartby, Bedfordshire is currently before Parliament. See the following link for details:
Special Procedure Orders which have completed their passage through Parliament (since 1.1.2000)