Haw. Rev. Stat. § 458-9: Revocation or suspension of licenses.

In addition to any other actions authorized by law, the director, in conformity with chapter 91, may revoke or suspend any license issued under this chapter for any cause authorized by law, including but not limited to fraud or dishonesty in obtaining the license, for dishonesty, fraud, gross negligence, or incompetency in the occupation of dispensing optician, or for violation of this chapter.