11.—(1) Works carried out under this Order in relation to a highway which consists of or includes a carriageway must be treated for the purposes of Part 3 of the 1991 Act (street works in England and Wales) 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 the 1991 Act (which defines what highway authority works are major highway works); or
(b)they are works which, had they been executed by the relevant highway authority, might have been carried out in exercise of the powers conferred by section 64 of the 1980 Act (dual carriageways and roundabouts).
(2) The provisions of the 1991 Act mentioned in paragraph (3) (which, together with other provisions of that Act, apply in relation to the carrying out of street works) and any regulations made, or code of practice issued or approved, under those provisions apply (with necessary modifications) in relation to any stopping up, alteration or diversion of a street of a temporary nature by the undertaker under the powers conferred by article 13 (temporary stopping up of streets and public rights of way) whether or not the stopping up, alteration or diversion constitutes street works within the meaning of that Act.
(3) The provisions of the 1991 Act referred to in paragraph (2) are—
(a)section 54 (advance notice of certain works), subject to paragraph (4);
(b)section 55 (notice of starting date of works), subject to paragraph (4);
(c)section 57 (notice of emergency works);
(d)section 59 (general duty of street authority to co-ordinate works);
(e)section 60 (general duty of undertakers to co-operate);
(f)section 68 (facilities to be afforded to street authority);
(g)section 69 (works likely to affect other apparatus in the street);
(h)section 71 (materials, workmanship and standard of reinstatement);
(i)section 76 (liability for cost of temporary traffic regulation);
(j)section 77 (liability for cost of use of alternative route); and
(k)all such other provisions as apply for the purposes of the provisions mentioned in sub-paragraphs (a) to (j).
(4) Sections 54 and 55 of the 1991 Act as applied by paragraph (1) have effect as if references in section 57 of 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.