Colorado Revised Statutes Title 37. Water and Irrigation § 37-91-111. Violations and penalties

(a) For any person to represent himself as a well construction contractor or a pump installation contractor who is not licensed under this article or to so represent himself after his license has been suspended or revoked or has lapsed;

(b) For any person not licensed under this article to advertise or issue any sign, card, or other device which would indicate that he is a well construction contractor or a pump installation contractor;

(c) For any person not licensed or whose license is suspended to construct wells unless he is a private driller or directly employed by or under the supervision of a licensed well construction contractor;

(d) For any person not licensed or whose license is suspended to install pumping equipment unless he is a private pump installer or directly employed by or under the supervision of a licensed pump installation contractor, except as excluded pursuant to section 37-91-106(4); or

(e) For any person to otherwise violate any of the provisions of this article.