C.R.S. § 37-90-108
Section 2 of chapter 30, Session Laws of Colorado 2013, provides that the act amending subsections (2)(a), (2)(d), and (3)(a) applies to permits issued for designated groundwater from the Dawson, Denver, Arapahoe, or Laramie-Fox Hills aquifers before, on, or after August 7, 2013.