C.R.S. § 30-20-1410

(1) A person who accumulates, stores, transports, or dispenses used tires shall: (a) Intentionally left blank —Ed. (I) Develop written criteria for distinguishing waste tires from used tires, maintain the criteria on site, and make the criteria available for inspection; (II) Clearly identify waste tires and used tires according to the criteria developed pursuant to subparagraph (I) of this paragraph (a); (b) Intentionally left blank —Ed. (I) Develop written criteria for distinguishing used tires being held for sale in Colorado from used tires being held for sale outside Colorado, maintain the criteria on site, and make the criteria available for inspection; (II) Clearly identify used tires being held for sale in Colorado and used tires being held for sale outside Colorado according to the criteria developed pursuant to subparagraph (I) of this paragraph (b); and (c) Organize used tires for sale in a manner that allows the inspection of each individual tire. (2) A person shall not sell a used tire if doing so would violate any of the conditions listed in section 42-4-228 , C.R.S. (3) The department may issue a waiver relating to any requirement of this section.