Conn. Agencies Regs. § 31-301-1
An appeal from an award, a finding and award, or a decision of the commissioner upon a motion shall be made to the Compensation Review Board by filing in the office of the commissioner form which such award or such decision on a motion originated an appeal petition and five copies thereof. Such appeal shall be filed within twenty days after the entry of such award or decision and shall be in substantial conformity with the forms approved by said board. Such commissioner within three days thereafter shall mail such petition and three copies thereof to the chairman of the Compensation Review board and a copy thereof to the adverse party or parties, and shall thereupon, or as soon thereafter as shall be practicable, cause to be filed with the Chairman of the Compensation Review Board a certified copy of the award or of the decision upon a motion together with a finding upon which the award was predicated, with such other parts of the record as are necessary for a proper consideration of the appeal. The commissioner shall, upon order of the Compensation Review Board, file a certified copy of any other document comprising a part of the record which the board deems necessary for the proper disposition of the appeal.
Conn. Agencies Regs. § 31-301-1