A. There is levied on any severer, and the department shall collect, an excise tax, denominated as a severance tax.
B. Except as provided in section 42-5203, the severance tax is in lieu of any other tax imposed upon the activities of mining and processing by article 1 of this chapter.
C. The amount of the severance tax levied on a severer engaging in the business of mining shall be determined by multiplying the net severance base by two and one-half per cent.