1.  The legislature shall provide by law for a tax upon the net proceeds of all minerals, including oil, gas and other hydrocarbons, extracted in this state, at a rate not to exceed 5 percent of the net proceeds. No other tax may be imposed upon a mineral or its proceeds until the identity of the proceeds as such is lost.

2.  The legislature shall appropriate to each county that sum which would be produced by levying a tax upon the entire amount of the net proceeds taxed in each taxing district in the county at the rate levied in that district upon the assessed valuation of real property. The total amount so appropriated to each county must be apportioned among the respective governmental units and districts within it, including the county itself and the school district, in the same proportion as they share in the total taxes collected on property according to value.

3.  Each patented mine or mining claim must be assessed and taxed as other real property is assessed and taxed, except that no value may be attributed to any mineral known or believed to underlie it, and no value may be attributed to the surface of a mine or claim if one hundred dollars? worth of labor has been actually performed on the mine or claim during the year preceding the assessment.