Colorado Revised Statutes Title 39. Taxation § 39-26-729. Retail sales of marijuana

(1)(a) Except as otherwise provided in subsection (1)(b) of this section, on and after July 1, 2017, all retail sales of marijuana upon which the retail marijuana sales tax is imposed pursuant to section 39-28.8-202 are exempt from taxation under part 1 of this article 26 by the state or by any special district or other limited purpose governmental entity that was not levying sales tax on retail sales of marijuana under part 1 of this article 26 before July 1, 2017. Notwithstanding any other law to the contrary, any special district or other limited purpose governmental entity that was levying sales tax on retail sales of marijuana under part 1 of this article 26 before July 1, 2017, retains its authority to continue levying sales tax upon retail sales of marijuana under this article 26.

(b) Any metropolitan district that levies a general uniform sales tax as authorized by section 32-1-1106(1), health assurance district that levies a general uniform sales tax as authorized by section 32-19-112(1), or health service district that levies a general uniform sales tax as authorized by section 32-19-112(1) may levy its general uniform sales tax on retail sales of marijuana upon which the retail marijuana sales tax is imposed pursuant to section 39-28.8-202 regardless of whether or not the district was levying any sales tax on such sales before July 1, 2017.