12.—(1) A street authority and the undertaker may enter into agreements between themselves with respect to—
(a)the maintenance of the structure of any bridge carrying a street over the Canal;
(b)the maintenance of the structure of any aqueduct over a street;
(c)any stopping up, alteration or diversion of a street under the powers conferred by this Order; or
(d)the execution in the street of any of the works referred to in article 5.
(2) Such an agreement may, without prejudice to the generality of paragraph (1)—
(a)make provision for the street authority to carry out any function which is conferred on the undertaker under this Order and which relates to the street in question; and
(b)contain such terms as to payment and otherwise as the parties consider appropriate.