13.—(1) A highway authority and the undertaker may enter into agreements with respect to—
(a)the strengthening, improvement, repair or reconstruction of any street required as a result of the exercise of the powers conferred by this Order;
(b)any stopping up, alteration or diversion of a street as part of or to facilitate the authorised development; or
(c)the carrying out in the street of any of the works referred to in article 10(1) (street works).
(2) Such an agreement may, without limitation on the scope of paragraph (1)—
(a)make provision for the highway authority to carry out any function under this Order which relates to the street in question;
(b)include an agreement between the undertaker and highway authority specifying a reasonable time for the completion of the works; and
(c)contain such terms as to payment and otherwise as the parties consider appropriate.