15.—(1) Subject to paragraph (4), any street to be constructed under this Order shall be completed to the reasonable satisfaction of the highway authority and shall, unless otherwise agreed, be maintained by and at the expense of DLRL for a period of 12 months from its completion and at the expiry of that period by and at the expense of the highway authority.
(2) Subject to paragraph (4), where a street is altered or diverted under this Order, the altered or diverted part of the street shall when completed to the reasonable satisfaction of the street authority, unless otherwise agreed, be maintained by and at the expense of DLRL for a period of 12 months from its completion and at the expiry of that period by and at the expense of the street authority.
(3) Nothing in this Order shall have effect in relation to street works as respects which the provisions of Part III of the 1991 Act apply.
(4) Paragraphs (1) and (2) shall not apply in relation to the structure of any bridge or tunnel carrying a street over or under any railway of DLRL.