Sec. 20. [Trusts and combinations prohibited.] Any combination by individuals, corporations, or associations, having for its object or effect the controlling of the price of any products of the soil, or of any article of manufacture or commerce, or the cost of exchange or transportation, is prohibited, and hereby declared unlawful, and against public policy. The Legislature shall pass laws for the enforcement of this section by adequate penalties, and in case of incorporated companies, if necessary for that purpose, it may declare a forfeiture of their franchise
ARTICLE XIII
REVENUE AND TAXATION
Section 1. [Fiscal year.] The fiscal year shall begin on the first day of January, unless changed by the Legislature.
Sec. 2. [What property taxable. Definitions. Revenue.] All property in the State, not exempt under the laws of the United States, or under this Constitution, shall be taxed in proportion to its value, to be ascertained as provided by law. The word property, as used in this article, is hereby declared to include monies, credits, bonds, stocks, franchises and all matters and things (real, personal and mixed) capable of private ownership; but this shall not be so construed as to authorize the taxation of the stocks of any company or corporation, when the property of such company or corporation represented by such stocks, has been taxed. The Legislature shall provide by law for an annual tax sufficient, with other sources of revenue, to defray the estimated ordinary expenses of the state for each fiscal year. For the purpose of paying the State debt, if any there be, the Legislature shall provide for levying a tax annually, sufficient to pay the annual interest, and principal of such debt, within twenty years from the final passage of the law creating the debt.