Where by reason of the stopping up, diversion or alteration of the level or width of a street by a local housing authority under powers exercisable by them by virtue of this Act—
is reasonably necessary for the purposes of their undertaking, the statutory undertakers may by notice in writing served on the authority require them to remove or alter the apparatus or to execute the works.
Where such a requirement is made and not withdrawn, the authority shall give effect to it unless—
At least seven days before commencing any works which they are required under this section to execute, the authority shall, except in case of emergency, serve on the undertakers notice in writing of their intention to do so; and if the undertakers so elect within seven days from the date of service of the notice on them, they shall themselves execute the works.
If the works are executed by the authority, they shall be executed at the authority's expense and under the superintendence (also at the authority's expense) and to the reasonable satisfaction of the undertakers; and if the works are executed by the undertakers, they shall be executed in accordance with the reasonable directions and to the reasonable satisfaction of the authority, and the reasonable costs of the works shall be repaid to the undertakers by the authority.
Any difference arising between statutory undertakers and a local housing authority under subsection (3) or (4), and any matter which by virtue of subsection (2)(b) is to be determined by arbitration, shall be referred to and determined by an arbitrator to be appointed, in default of agreement, by the Secretary of State.
In this section—