22In section 223 of that Act (determination to cease to have effect when plans not proceeded with), at the end add—
“(7)In any case—
(a)to which this section may be applicable; and
(b)which relates to plans for the erection of a building in any part of a street in Wales which is treated as being in the area of a street works authority other than the Welsh council for the county or county borough in which it is situated,
the Welsh council shall within one week inform the street works authority of the happening of any event of a kind described in paragraphs (a) to (c) of subsection (6) above.”