5.—(1) The following provisions of this paragraph apply where a licence holder requires to carry out any controlled works in a street near to—
(a)any gas apparatus of any other licence holder;
(b)any electric lines or electrical plant of any electricity licence holder; or
(c)any telecommunication apparatus which is operated by a person to whom the telecommunications code applies; or
(d)any other apparatus belonging to or under the jurisdiction or control of a government department or other person (not being a licence holder).
(2) Where the licence holder finds it necessary to undermine but not alter the position of any gas apparatus, electric line, electrical plant, telecommunication apparatus or other apparatus he shall temporarily support it in position during the execution of the works, and before completion provide a suitable and proper foundation for it where so undermined.
(3) Any question arising under this paragraph shall, in default of agreement, be determined by arbitration.