21In subsection (2) of section fifty (which enables the councils of counties and county boroughs to exercise the powers conferred on drainage boards by section twenty-eight of this Act) after the words "county borough", in each place where they occur, there shall be inserted the words
“or county district”; and after that subsection there shall be inserted the following subsection :—
“(2a)Before exercising in relation to any watercourse or part of a watercourse in a river board area any power conferred on it by subsection (2) of this section a council shall notify the drainage board concerned, that is to say, if the watercourse or part is in an internal drainage district, the drainage board of that district, and, in any other case, the river board.”