22(1)This paragraph applies where—
(a)the manner of construction and the line and situation of any necessary alternative apparatus have been agreed or determined as provided under paragraph 21, and
(b)any such facilities and rights as are referred to in paragraph 20 have been granted to or obtained by the undertakers, or an undertaking has been given that such facilities or rights will be granted.
(2)The undertakers must proceed with all reasonable despatch to—
(a)construct and bring into operation the alternative apparatus, and
(b)remove any apparatus required by the nominated undertaker to be removed under the provisions of this Part.
(3)If the undertakers fail to comply with sub-paragraph (2)(b), the nominated undertaker may remove the apparatus.
(4)Following the removal of apparatus under the provisions of this Part, or its abandonment, any rights of the undertakers relating to that apparatus in or over the land in which it was or is situated are extinguished and all responsibility of the undertakers for any apparatus which is abandoned is to cease.