Colo. Rev. Stat. § 1-4-102
All candidates for nominations to be made at any primary election shall be placed on the primary election ballot either by certificate of designation by assembly or by petition.
Source: L. 80: Entire article R&RE, p. 322, § 1, effective January 1, 1981. L. 92: Entire part amended, p. 673, § 4, effective January 1, 1993.
Editor's note: This section is similar to former § 1-14-203 as it existed prior to 1980.