The board shall have the right, in accordance with rules and regulations promulgated under the provisions of article three, chapter twenty-nine-a of this code, to refuse to admit an applicant for the licensure examination for the hereinafter stated reasons, and also the board shall have the power to revoke or suspend any license to practice practical nursing issued by the board in accordance with the provisions of this article, or to otherwise discipline a licensee upon satisfactory proof that the person: (1) Is guilty of fraud or deceit in procuring or attempting to procure a license to practice practical nursing; or (2) is convicted of a felony; or (3) is habitually intemperate or is addicted to the use of habit-forming drugs; or (4) is mentally incompetent; or (5) is guilty of professional misconduct as defined by the board; or (6) who practices or attempts to practice without a license or who willfully or repeatedly violates any of the provisions of this article.