1. The provisions of this chapter relating to:
(a) The imposition, collection and remittance of the sales tax apply to every retailer whose activities have a sufficient nexus with a county to satisfy the requirements of the United States Constitution.
(b) The collection and remittance of the use tax apply to every retailer whose activities have a sufficient nexus with a county to satisfy the requirements of the United States Constitution.
2. In administering the provisions of this chapter, the Department shall construe the terms “seller,” “retailer” and “retailer maintaining a place of business in a county” in accordance with the provisions of subsection 1.