11.—(1) Network Rail may, for the purposes of the authorised development, enter upon so much of any of the streets specified in Schedule 4 (streets subject to street works) as is within the Order limits and may—
(a)break up or open the street, or any sewer, drain or tunnel under it;
(b)tunnel or bore under the street;
(c)place apparatus in the street;
(d)maintain apparatus in the street or change its position; and
(e)execute any works required for or incidental to any works referred to in sub-paragraphs (a), (b) (c) and (d).
(2) In this article, “apparatus” has the same meaning as in Part 3 of the 1991 Act.