C.R.S. § 8-70-112

(1) Claims are divided into classifications, as follows: (a) Initial claim, which establishes a benefit year and is valid as defined in section 8-70-111 (2)(a); or (b) Additional claim, which reopens a claim series within an existing benefit year after a second or subsequent period of unemployment; or (c) Reopened claim, which reopens a claim within an existing benefit year when there has been no intervening employment since the last claim for a week of unemployment.