If the state is able to enforce the obligation to collect and remit sales tax on remote7 sellers who deliver tangible personal property, products transferred electronically, or services8 directly to the citizens of South Dakota, the additional net revenue from such obligation shall9 be used to reduce the rate of certain taxes. The rate of tax imposed by §§ 10-45-2, 10-45-5, 10- 45-5.3, 10-45-6, 10-45-6.1, 10-45-6.2, 10-45-8, 10-45-71, 10-46-2.1, 10-46-2.2, 10-46-58, 10- 46-69, 10-46-69.1, 10-46-69.2, and 10-46E-1, and 10-58-1 shall be reduced by one-tenth percent12 on July first following the calendar year for which each additional twenty million dollar13 increment of net revenue is collected and remitted by such remote sellers. However, the rate of14 tax imposed by §§ 10-45-2, 10-45-5, 10-45-5.3, 10-45-6, 10-45-6.1, 10-45-6.2, 10-45-8, 10-45- 71, 10-46-2.1, 10-46-2.2, 10-46-58, 10-46-69, 10-46-69.1, 10-46-69.2, and 10-46E-1, and 10- 58-1 may not be reduced below four percent pursuant to the provisions of this section.