In Lutheran Hospital & Homes Society v. Industrial Claim Appeals Office, 710 P.2d 496 (Colo. App. 1985), the petitioner filed its petition for review twenty-one days after the order was entered and mailed. The statute then in effect also provided that a petition for review must be filed within twenty days after the Industrial Claim Appeals Office issued its order. See Colo. Sess. Laws 1984, ch. 60, 8-74-107(2) at 318. The petitioner there argued that filing within twenty days of petitioner's receipt of the order was timely. The court rejected the argument, concluding that, based on its interpretation of the entire statutory scheme, the twenty-day period began to run when the ICAO mailed its final order, not when the petitioner received it.