(a) The relevant books of every person engaged in the severing of coal or lignite in the State of Alabama shall be open to inspection by duly authorized agents of the Department of Revenue selected or appointed for the purpose of aiding in the collection and enforcement of the tax imposed by this article.
(b) The Department of Revenue is authorized and empowered to issue such forms and to make reasonable rules, regulations and promulgations as may be necessary to enforce and collect the tax imposed by this article, including the imposition of a delinquent penalty not to exceed 10 percent of the amount of such tax; provided, however, that such penalty may be waived by the Department of Revenue if a good and sufficient reason therefor is shown.