23.—(1) In this Schedule—
“existing transmission licence” means a transmission licence which is in force immediately before the day on which Article 5 comes into operation;
“implementation purposes” means the purposes of implementing the SEM in accordance with the timetable for implementation for the time being published by the Authority or facilitating the operation of the SEM;
“property arrangements scheme” has the meaning given by paragraph 1(2);
“relevant existing transmission licence holder”, in relation to a property arrangements scheme, or an application for such a scheme, means the existing transmission licence holder to whose property, rights or liabilities the scheme, or application, relates;
“system operator” means the person designated under paragraph 21;
“third party”, in relation to a property arrangements scheme, means a person other than the system operator or the relevant existing transmission licence holder.
(2) For the purposes of this Schedule, a provision of a property arrangements scheme adversely affects a third party if—
(a)his consent or concurrence would be required to the making of the provision otherwise than by means of the scheme, and
(b)he does not consent to the making of the provision by means of the scheme.