If the Commissioner finds that a contractor has violated any of the provisions of the Oklahoma Asbestos Control Act or any rule promulgated pursuant to the Oklahoma Asbestos Control Act, the Commissioner may suspend, revoke or refuse to issue the license of the contractor after a hearing held for such purpose. Such hearing shall be held within thirty (30) days after written notice has been sent to the contractor by certified mail. If, after such hearing, the Commissioner finds cause to suspend, revoke or refuse to issue a license, the contractor shall be given written notice of the decision of the Commissioner and the basis therefor. The decision shall become final at the end of thirty (30) days from the date of such notice, unless appealed to the district court. All appeals from the Commissioner's order shall be taken in the manner prescribed by law.