2Subject as aforesaid, the functions exercisable by the council of a county borough under or by virtue of Part V and section 51 of the Act of 1930 and sections 28 and 34 of the Act of 1961 shall also be exercisable as respects the metropolitan watercourses by the Greater London Council, and accordingly references in those provisions to a county borough and the council thereof shall, in their application to the metropolitan watercourses, be construed as including references respectively to Greater London and the Greater London Council.