Section 16. Subject and title of bills; amendment or revival of statutes

No bill shall contain more than one subject, except appropriation bills and bills for revision or codification of statutes. The subject of each bill shall be expressed in its title. No law shall be revived or amended, unless the new act contain the entire act revived or the section or sections amended, and the section or sections so amended shall be repealed. The provisions of this section shall be liberally construed to effectuate the acts of the legislature.