13. — (1) The making, review, amendment or replacement of a litter management plan under section 10 or 12 shall be a reserved function.

(2) For the purposes of subsection (1), “ reserved function ” means—

(a) in relation to the council of a county or an elective body, a reserved function for the purposes of the County Management Acts, 1940 to 1994,

(b) in relation to the corporation of a county borough, a reserved function for the purposes of the Acts relating to the management of the county borough.