(a) An alarm business license may be suspended or revoked by the Chief of Police for any of the following causes:
(1) The license was knowingly obtained through any fraud or misstatement.
(2) The business transactions of the alarm business have been marked by a practice of failure to perform contracts.
(3) Licensee fails to comply with any provisions of this chapter which the Chief of Police deems contrary to the intent and purpose of this chapter.
(4) Conviction of any felony or any misdemeanor reflecting on his suitability for a license.
(b) The suspension or revocation shall not take place until the Chief of Police has notified the licensee in writing of the cause or causes for such revocation or suspension which notice shall:
(1) Contain a brief statement of the facts relating to the revocation or suspension;
(2) Advise the licensee of the procedure for appeal; and
(3) Be served upon the licensee in person or by leaving it at his address as stated in the application for a license or at the business address on file with the Chief of Police or by regular U.S. mail addressed to the licensee at such address.