Colorado constitution
Article XX
Section 12

Upon the canvass of the vote showing the adoption of the constitutional provisions creating and governing the city and county of Broomfield, the governor shall issue a proclamation accordingly, and, on and after November 15, 2001, the city of Broomfield and those parts of the counties of Adams, Boulder, Jefferson, and Weld included in the boundaries of said city shall be consolidated into the city and county of Broomfield. The duties and terms of office of all officers of Adams, Boulder, Jefferson, and Weld counties shall no longer be applicable to and shall terminate with regard to the city and county of Broomfield. On and after November 15, 2001, the terms of office of the mayor and city council of the city of Broomfield shall terminate with regard to the city of Broomfield and said mayor and city council shall become the mayor and city council of the city and county of Broomfield. The city council of the city and county of Broomfield, in addition to performing the duties prescribed in the city and county charter and ordinances, shall perform the duties of a board of county commissioners or may delegate certain duties to various boards and commissions appointed by the city council of the city and county of Broomfield. The city and county of Broomfield shall be a successor district of the city of Broomfield under section 20 of article X of this constitution. Any voter approval granted the city of Broomfield under section 20 of article X of this constitution prior to November 15, 2001, shall be considered voter approval under said section for the city and county of Broomfield. The city and county of Broomfield shall have the power to continue to impose and collect sales, use, and property taxes that were imposed by the city of Broomfield and the counties of Adams, Boulder, Jefferson, and Weld within the areas where said taxes were imposed on November 14, 2001, until the voters of the city and county of Broomfield approve uniform sales, use, and property taxes within the city and county of Broomfield or approve increased sales, use, or property taxes within the city and county of Broomfield. Any violation of any criminal statutes of the state of Colorado occurring on or before November 14, 2001, shall continue to be prosecuted within the county where the violation originally occurred.