Modified Right-to-Work Law
Colorado is a modified right-to-work state, with the most progressive labor law in the country. The Colorado Labor Peace Act requires two elections and approval from 75 percent of a company's workers before becoming unionized.
Without the 75% approval, there can be no all-union agreement in the collective bargaining agreement, just as in a right-to-work state. In 2020, only 8.2% of Colorado’s workforce was a member of a union.