§459-9 Refusal to permit examination or issue license; revocation and suspension of license; grounds for. In addition to any other actions authorized by law, the Hawaii board of optometry may refuse to admit persons to its examinations or to issue a license or may revoke or suspend, for the period of time as may be determined by the board, a license previously issued, or may impose a penalty as shall be established by the board, for any cause authorized by law, including but not limited to the following: