C.R.S. § 39-22-4402

For the five consecutive income tax years immediately following the year in which the executive director files written certification with the revisor of statutes as specified in section 39-22-1001 (8) that a line on the income tax return form has become available and the Colorado for Healthy Landscapes fund voluntary contribution is next in the queue established pursuant to said section 39-22-1001 (8), the Colorado state individual income tax return form shall contain a line whereby each individual taxpayer may designate the amount of the contribution, if any, the individual wishes to make to the Colorado for Healthy Landscapes fund created in section 39-22-4403 (1).