Colorado Revised Statutes Constitution of 1876 Art. V, § 25. Special legislation prohibited

The general assembly shall not pass local or special laws in any of the following enumerated cases, that is to say;  for granting divorces;  laying out, opening, altering or working roads or highways;  vacating roads, town plats, streets, alleys and public grounds;  locating or changing county seats;  regulating county or township affairs;  regulating the practice in courts of justice;  regulating the jurisdiction and duties of police magistrates;  changing the rules of evidence in any trial or inquiry;  providing for changes of venue in civil or criminal cases;  declaring any person of age;  for limitation of civil actions or giving effect to informal or invalid deeds;  summoning or impaneling grand or petit juries;  providing for the management of common schools;  regulating the rate of interest on money;  the opening or conducting of any election, or designating the place of voting;  the sale or mortgage of real estate belonging to minors or others under disability;  the protection of game or fish;  chartering or licensing ferries or toll bridges;  remitting fines, penalties or forfeitures;  creating, increasing or decreasing fees, percentage or allowances of public officers;  changing the law of descent;  granting to any corporation, association or individual the right to lay down railroad tracks;  granting to any corporation, association or individual any special or exclusive privilege, immunity or franchise whatever. In all other cases, where a general law can be made applicable no special law shall be enacted.