It is hereby declared unlawful for any motor carrier, his or its agents or employees to operate any powered motor vehicle, as a motor carrier for hire, within this state, without the identification device issued by the Commission, said device to be displayed as provided by the rules of the Commission.
Laws 1939, p. 58, § 3; Laws 1968, c. 190, § 15, eff. Sept. 30, 1968; Laws 1969, c. 92, § 2, emerg. eff. March 25, 1969; Laws 1971, c. 102, § 2, emerg. eff. April 26, 1971.