Taxes - As enacted, increases, by 15 cents over a 10-year period, and subject to a two-thirds vote of the county legislative body, the maximum mineral severance tax rate that may be levied by a county on all sand, gravel, sandstone, chert, and limestone severed from the ground within its jurisdiction; removes the authorization for Smith County to allocate its mineral severance tax to the county general fund or a fund other than its county road fund. - Amends TCA Title 67, Chapter 7, Part 2. Companion bill has been assigned Public Chapter Number 285 by the Secretary of State.