C.R.S. § 39-21-104.5

(1) As used in this part 1, unless the context otherwise requires, “frivolous submission” means a request for a hearing related to the tax set forth in part 1 of article 22 of this title made pursuant to section 39-21-103 or 39-21-104 that is based on a position that was previously rejected in a published opinion by a Colorado or federal court. (2) If the executive director determines that a request for a hearing made pursuant to section 39-21-103 or 39-21-104 is a frivolous submission, the executive director may reject the request. If the executive director does not reject the request, the provisions of section 39-21-103 or 39-21-104 shall apply. (3) If the executive director rejects a taxpayer’s request for a hearing: (a) The executive director shall notify the taxpayer in writing within a reasonable time after receiving the taxpayer’s request that the taxpayer’s request has been rejected; and (b) The executive director shall make a final determination within a reasonable time after receiving the taxpayer’s request for a hearing and shall send the taxpayer a notice of final determination accompanied by a notice and demand for payment by first-class mail as set forth in section 39-21-105.5">39-21-105.5 . (4) A taxpayer may appeal the final determination of the executive director in accordance with the provisions of section 39-21-105 . (5) Unless an appeal is taken as provided in section 39-21-105 , the tax, together with interest thereon and penalties, if any, shall be paid within thirty days after mailing of the notice and demand for payment by the executive director.