For tax years beginning after December 31, 2018, notwithstanding any other provision of this chapter and in lieu of the tax imposed by §§ 47-1806.03(a)(7)(A), 47-1807.02(a)(4), and 47-1808.03(a)(4), the tax on a capital gain from the sale or exchange of an investment in a Qualified High Technology Company, as defined in § 47-1817.01(5)(A), shall be at the rate of 3% if:
(1) The investment was made after [March 11, 2015];
(2) The investment was held by the investor for at least 24 continuous months;
(3) At the time of the investment, the stock of the Qualified High Technology Company was not publicly traded; and
(4) The investment is in common or preferred stock of the Qualified High Technology Company.