Any authority other than those referred to in section 12(1) of this Act by whom precepts are issued to any rating authority, or any rating authority to whom such precepts are issued, may make and submit to the Minister a scheme for applying to those precepts the provisions of the said section 12, subject to such modifications as may appear to be necessary having regard to the basis of apportionment or the incidence of charge existing immediately before the scheme is proposed to come into force; and the Minister may, after giving any authorities concerned an opportunity of objecting, by order confirm the scheme either without modifications or subject to such modifications as he thinks fit:

Provided that, if an objection to any such scheme is made by any of the authorities concerned and is not withdrawn, the order shall be provisional only and shall not have effect unless and until confirmed by Parliament.

A scheme duly made, submitted and confirmed in accordance with the provisions of the foregoing subsection shall, subject to the provisions of the confirming order, have effect as if enacted in this Act.