Upon determination by the commissioner that any person certified or having a permit issued under the provisions of this chapter or any person who has applied for such certification or a permit has violated or failed to comply with any of the provisions or requirements of this chapter or any rules and regulations promulgated thereunder, the commissioner shall be authorized to revoke such certification or permit, or both, or he shall refuse to issue a certification or a permit, or both, to an applicant therefor. The performance of unauthorized work not covered by a permit, making misrepresentations or any fraudulent practices, failure to perform a contract, failure to have in its employ, when required, a certified operator or branch supervisor or use or continued use of ineffective methods or materials shall also be valid grounds for revocation of a certification or a permit; provided, however, that no certification or permit shall be revoked unless the holder thereof shall be given at least 10 days' notice that such action is to be considered by the commissioner with an opportunity being given for a hearing before the commissioner.

Any applicant refused or denied a certification or permit, or both, or any person whose certification or permit, or both, are revoked shall be entitled to appeal such action of the commissioner to the State Board of Agriculture and Industries by filing with the commissioner within a period of 15 days a written notice or demand for review of the action of the commissioner in denying or revoking a certification or permit, or both. The State Board of Agriculture and Industries shall review the action of the commissioner and make a finding as to whether the certification or permit, or both, shall be issued or revoked. Any person denied or refused a certification or permit or any person whose certification or permit has been revoked by action of the commissioner shall have the right to appear before the board and be heard in support of his appeal. Any person whose certification or permit to perform work or services as regulated under this chapter has been revoked shall not be eligible to have such a certification or permit again issued to him for a period of not less than one year following the date on which such a certification or permit was revoked. Nothing contained in this chapter shall require the commissioner to issue a certification or permit to any person who has been convicted for a violation of this chapter.