(a) The department shall administer and collect this tax and shall promulgate rules and regulations necessary and reasonable for the administration of this article. It shall be the duty of the department to include in such regulations an appropriate method to allocate funds collected to the county where the severed material was severed or processed. Any records related to the collection, distribution, and enforcement of this tax in a particular county, including serverance tax returns, shall be made available to the county commission of the county upon request from the county commission.

(b) The department and producers shall use the inventory accounting principle known as "first in-first out" in determining the tax payable on stockpiles or inventories of severed material sold, and to which county the tax revenue should be allocated, regardless of where the severed material is stored or sold. Any records detailing the allocation of funds under this subsection shall be forwarded to the county commission in a county receiving an allocation at the time the monies are distributed to the county.

(c) For severed materials governed by the provisions of Section 40-13-53(b)(5), the severance tax shall be collected at the time the product is first transported on a public road in this state. The first purchaser as defined in Section 40-13-53(b)(5) shall collect and remit the severance tax, and shall provide reports concerning this taxable event to the department as set out for producers in Section 40-13-56.