C.R.S. § 35-80-106

(1) Each pet animal facility shall apply to renew its license on or before the expiration date of the license. Said application shall be in the form and manner prescribed by the commissioner and shall be accompanied by the required renewal fee. (2) If the application for renewal is not postmarked on or before the expiration date of the license, a penalty fee of ten percent of the renewal fee shall be assessed. No license shall be renewed until the renewal fee and any penalty fee are paid. (3) If the application and fee for renewal are postmarked later than one calendar month after the expiration date of the license, the license shall not be renewed and the pet animal facility shall apply for a new license. (4) The commissioner may refuse to renew a license pursuant to this section for failure to pay an outstanding civil penalty imposed under section 35-80-113 .