(b) School tax funds shall be expended only for the support and maintenance of public schools, public vocational-technical schools, public education, and activities necessary or incidental thereto, including school lunch purposes.
(c) The 20 mill limitation provided for in subparagraph (a) of this Paragraph shall not apply to those school systems which are authorized on June 30, 1983, to levy a school tax in excess thereof.
(d) The method of certification and levy of the school tax provided for in subparagraph (a) of this Paragraph shall not apply to those systems that are authorized on June 30, 1983, to utilize a different method of certification and levy of such tax; but the General Assembly may by law require that such systems be brought into conformity with the method of certification and levy herein provided.
