Mo. Const. art. X, § 6(a)

The general assembly may provide that a portion of the assessed valuation of real property actually occupied by the owner or owners thereof as a homestead, be exempted from the payment of taxes thereon, in such amounts and upon such conditions as may be determined by law, and the general assembly may provide for certain tax credits or rebates in lieu of or in addition to such an exemption, but any such law shall further provide for restitution to the respective political subdivisions of revenues lost, if any, by reason of the exemption, and any such law may also provide for comparable financial relief to persons who are not the owners of homesteads but who occupy rental property as their homes. [Effective - 02 Sep 1982 , see footnote]