21In section 220 of that Act (determination of payments under advance payments code), in subsection (1), after first “subsection (2)” insert “or (2A)”, after “district council” insert “or Welsh council” and for second “subsection (2)” substitute “subsections (2) and (2A)” and, after subsection (2), insert—
“(2A)Where any required plans which—
(a)are deposited with a Welsh council; and
(b)relate to the erection of a building in an area—
(i)in which the advance payments code is in force; but
(ii)which is treated as being within the area of a street works authority other than that Welsh council,
are passed, the Welsh council shall, in any case to which section 219 above may be applicable, within one week inform the street works authority of that event.”