If the Legislature shall by law provide, or shall at any time appear to have by law provided, for the publication of the assessment of real or personal property, or both, to be paid for out of the county treasury, then said board of commissioners shall in each year, while such publication is required, make due provision for the cost thereof by sufficient appropriation in such resolution, which said appropriation shall take precedence over all the other appropriations contained in such resolution, excepting the provision for principal and interest of county indebtedness, the ordinary, current salaries of county officials and employees, the maintenance of county property and institutions (including courts and juries), dieting occupants of the jails, prisons, hospitals and industrial schools, and the cost of elections required by law. Such appropriations shall take precedence of any appropriation for contingent fund or building fund; and if the tax actually collected in any such year shall be less than the total amount of the appropriations contained in said resolution, the items of appropriation following in such resolution after such appropriation for publishing assessments, in the order herein directed, shall be first abated, before the appropriation for such publication of tax assessments shall be reduced. The vote of said board of commissioners upon said appropriation bill shall be taken by yeas and nays, and the same shall be entered upon the journal. Such appropriation bill shall not take effect until after it shall have been once published in a newspaper published in Chicago, and said board shall provide for and cause said appropriation bill to be published as aforesaid.