3.—(1) Works executed under this Order in relation to a highway which consists of or includes a carriageway shall be treated for the purposes of Part III of the 1991 Act (street works) as major highway works if—
(a)they are of a description mentioned in any of paragraphs (a), (c) to (e), (g) and (h) of section 86(3) of that Act (which defines what highway authority works are major highway works); or
(b)they are works which, had they been executed by the highway authority, might have been carried out in exercise of the powers conferred by section 64 of the Highways Act 1980(1) (dual carriageways and roundabouts) or section 184 of that Act (vehicle crossings).
(2) In Part III of the 1991 Act, references, in relation to major highway works, to the highway authority concerned shall, in relation to works which are major highway works by virtue of sub-paragraph (1), be construed as references to the Executive.
(3) The provisions of the 1991 Act mentioned in paragraph (4), and any regulations made, or code of practice issued or approved under, those provisions shall apply (with the necessary modifications) in relation to the stopping up, alteration or diversion of a street by the Executive under the powers conferred by article 13 of this Order where no street works are executed in that street as they would apply if the stopping up, alteration or diversion were occasioned by street works executed in that street by the Executive.
(4) The provisions of the 1991 Act referred to in paragraph (3) are—
section 54 (advance notice of certain works) subject to paragraph (5);
section 55 (notice of starting date of works) subject to paragraph (5);
section 59 (general duty of street authority to co-ordinate works);
section 60 (general duty of undertakers to co-operate);
section 69 (works likely to affect other apparatus in the street);
section 76 (liability for cost of temporary traffic regulation);
section 77 (liability for cost of alternative route); and
all such other provisions as apply for the purposes of the provisions mentioned above.
(5) Sections 54 and 55 of the 1991 Act as applied by paragraph (3) shall have effect as if references in section 57 to that Act to emergency works were a reference to a stopping up, alteration or diversion (as the case may be) required in a case of emergency.