Colorado voters have the option of allowing younger politicians to be elected to seats under the Golden Dome, thanks to Colorado Amendment V.

FILE – In this Feb. 15, 2013 file photo, Rep. Dickey Lee Hullingworst, center, D-Boulder, shows House Minority Leader Mark Waller, left, R-Colorado Springs and Rep. Brian DelGrosso, R-Loveland, her whistle as the debate over gun control bills goes on at the Capitol in Denver. In the coming months, Colorado lawmakers will address budgetary surpluses that require refunds to taxpayers, government control over energy development, and a possible overhaul of the medical marijuana industry, issues made more challenging with split-party rule of the state Legislature. (AP Photo/Ed Andrieski, File)
FILE – In this Feb. 15, 2013 file photo, Rep. Dickey Lee Hullingworst, center, D-Boulder, shows House Minority Leader Mark Waller, left, R-Colorado Springs and Rep. Brian DelGrosso, R-Loveland, her whistle as the debate over gun control bills goes on at the Capitol in Denver. In the coming months, Colorado lawmakers will address budgetary surpluses that require refunds to taxpayers, government control over energy development, and a possible overhaul of the medical marijuana industry, issues made more challenging with split-party rule of the state Legislature. (AP Photo/Ed Andrieski, File)

The proposed amendment, which was passed by two-thirds of members in both chambers of the state Legislature in 2017, seeks to change the minimum age to serve as a either a state senator or state representative from 25 to 21 years old.

The bill calling for the constitutional amendment was sponsored by state Sen. Vicki Marble (R-Fort Collins), Mike Merrifield (D-Colorado Springs) and Reps. Kevin Van Winkle (R-Highlands Ranch) and Jovan Melton (D-Aurora).

Colorado joins only Arizona and Utah in the trio of states with a minimum age requirement of 25 for members of both chambers of the general assembly, according to the National Conference of State Legislatures. While age requirements for senators can greatly vary by state, about half of the states in the country have an age requirement of 21 years old to serve as a state representative. Nearly a dozen other states have a minimum age requirement of just 18 years old, and several other states have no age requirements on the books at all, according to the NCSL.

The average age of state representatives and senators in Colorado was 53 and 57, respectively, in 2015, according to an analysis conducted by the National Conference of State Legislatures.

An identical Colorado measure, Referendum L, was defeated by Colorado voters in 2008.