The commissioner or a representative designated by the commissioner may investigate any alleged violation of the provisions of this chapter and, if there appears to be reasonable cause therefor, on reasonable notice to any person accused of any such violation, may refer the matter to the board for hearing; may make complaint to the prosecuting authority having jurisdiction of any such complaint or may examine into all acts of alleged abuse, fraud, or incompetence. The board may suspend the license of any registered hairdresser and cosmetician, and may revoke the hairdresser and cosmetician license of any person convicted of violating any provision of this chapter or any regulation adopted under this chapter or take any of the actions set forth in § 19a-17 for any of the following reasons: (1) The employment of fraud or deception in obtaining a license; (2) abuse or excessive use of drugs, including alcohol, narcotics or chemicals; (3) engaging in fraud or material deception in the course of professional services or activities; (4) physical or mental illness, emotional disorder or loss of motor skill, including, but not limited to, deterioration through the aging process; or (5) illegal, incompetent or negligent conduct in the course of professional activities. The commissioner may order a license holder to submit to a reasonable physical or mental examination if the physical or mental capacity of the license holder to practice safely is the subject of an investigation. The commissioner may petition the superior court for the judicial district of Hartford to enforce such order or any action taken pursuant to § 19a-17. No license issued pursuant to this chapter shall be revoked or suspended under this section until the licensee has been given notice and opportunity for hearing as provided in the regulations adopted by the commissioner.