The Colorado Secretary of State announced that the two ballot measures referred to the voters by the Colorado General Assembly will be Propositions CC and DD. Propositions CC and DD will appear on the 2019 Coordinated Election ballot in November. 

Proposition CC: Retain revenue for education and transportation

WITHOUT RAISING TAXES AND TO BETTER FUND PUBLIC SCHOOLS, HIGHER EDUCATION, AND ROADS, BRIDGES, AND TRANSIT, WITHIN A BALANCED BUDGET, MAY THE STATE KEEP AND SPEND ALL THE REVENUE IT ANNUALLY COLLECTS AFTER JUNE 30, 2019, BUT IS NOT CURRENTLY ALLOWED TO KEEP AND SPEND UNDER COLORADO LAW, WITH AN ANNUAL INDEPENDENT AUDIT TO SHOW HOW THE RETAINED REVENUES ARE SPENT?
Text of legislative bill (PDF)

Proposition DD: Authorize and tax sports betting

SHALL STATE TAXES BE INCREASED BY TWENTY-NINE MILLION DOLLARS ANNUALLY TO FUND STATE WATER PROJECTS AND COMMITMENTS AND TO PAY FOR THE REGULATION OF SPORTS BETTING THROUGH LICENSED CASINOS BY AUTHORIZING A TAX ON SPORTS BETTING OF TEN PERCENT OF NET SPORTS BETTING PROCEEDS, AND TO IMPOSE THE TAX ON PERSONS LICENSED TO CONDUCT SPORTS BETTING OPERATIONS?
Text of legislative bill (PDF)