13.—(1) A street authority and the undertaker may enter into agreements with respect to—
(a)the strengthening, improvement, repair or reconstruction of any street under the powers conferred by this Order;
(b)any closure, prohibition, restriction, alteration or diversion of a street authorised by this Order;
(c)the undertaking in the street of any of the works referred to in article 8 (street works) article 9 (power to alter layout, etc., of streets) and article 10(1) (construction and maintenance of altered streets) ; or
(d)the adoption by a street authority which is the highway authority of works—
(i)undertaken on a street which is existing public maintainable highway; or
(ii)which the undertaker and highway authority agree to be adopted as public maintainable highway.
(2) If such an agreement provides that the street authority must undertake works on behalf of the undertaker the agreement may, without prejudice to the generality of paragraph (1)—
(a)make provision for the street authority to carry out any function under this Order which relates to the street in question;
(b)specify a reasonable time for the completion of the works; and
(c)contain such terms as to payment and otherwise as the parties consider appropriate.