Section 31-7-306 - Commercial drivers prohibited from operating with any alcohol in system(a) Notwithstanding any other provision of this title, a person may not drive, operate or be in physical control of a commercial motor vehicle while having alcohol in his system.(b) A person who drives, operates or is in physical control of a commercial motor vehicle while having alcohol in his system as provided by W.S. 31-7-307 shall be placed out-ofservice for twenty-four (24) hours.Amended by Laws 2011 , ch. 178, § 1, eff. 7/1/2011.