(a) Any person who, after receiving written notice of noncompliance from the attorney general or a district attorney, conducts business as a commercial telephone seller without having registered with the attorney general as required by section 6-1-303 commits a class 1 misdemeanor and shall be punished as provided in section 18-1.3-501, C.R.S.;

(b) Any commercial telephone seller who knowingly engages in any unlawful telemarketing practice as defined in section 6-1-304 (1) (b) to (1) (h) commits a class 1 misdemeanor and shall be punished as provided in section 18-1.3-501, C.R.S.

(c) A person who engages in any unlawful telemarketing practice as defined in Section 6-1-304(4) shall be liable in a private civil action to the owner of the cellular telephone for consequential damages, court costs, attorney fees, and a penalty in the amount of at least three hundred dollars and not more than five hundred dollars for a first offense and at least five hundred dollars and not more than one thousand dollars for a second or subsequent offense.