715.16 SUSPENSION OR REVOCATION.
   (a)   The license of any person violating any of the terms of this chapter or any of the rules and regulations established and adopted by the Safety-Service Director as provided in Section 715.07, except those relating to the exhibition or operation of such machine, device or amusement arcade for gambling, shall, for the first violation thereof, be suspended by the Safety-Service Director for not less than ten nor more than thirty days; for the second violation thereof, be suspended by the Safety-Service Director for not less than thirty nor more than sixty days; and for the third violation thereof, shall be revoked by the Safety-Service Director. For violation of the terms of this chapter or the rules and regulations established and adopted by the Safety-Service Director relating to the exhibition or operation of such machine, device or amusement arcade for gambling, such license shall be revoked by the Safety-Service Director.
 
   (b)   In case of any hearing before the Safety-Service Director involving the denial of a license to an applicant therefor, as provided by Section 715.04, or involving the suspension or revocation of a license of a licensee, as provided herein, the Safety-Service Director shall notify such applicant or licensee of such hearing by registered mail directed to the last address of such applicant or licensee on file with the Safety-Service Director. In the event such license is denied, suspended or revoked, the Safety-Service Director shall notify such applicant or licensee of such denial, suspension or revocation in the same manner as provided above for notification of hearings.