4. The commissioner may deny any application for registration as set forth in subdivisions one and two of this section or revoke any registration already granted, after written notice to the applicant or registrant and an opportunity to be heard, when:

1. (a) Any statement in the application or upon which it was issued is or was false or misleading;
2. (b) If facilities of the applicant or registrant are not maintained in a manner as required by rules and regulations duly promulgated by the commissioner;
3. (c) The applicant or registrant, or an officer, director, partner or holder of ten per centum or more of the voting stock of the applicant or registrant, has failed to comply with any of the provisions of this chapter or rules and regulations promulgated pursuant thereto;
4. (d) The applicant or registrant, or an officer, director, partner or holder of ten per centum or more of the voting stock of the applicant or registrant, has been convicted of a felony by a court of the United States or any state or territory thereof, without subsequent pardon by the governor or other appropriate authority of the state or jurisdiction in which such conviction occurred, or receipt of a certificate of relief from disabilities or a certificate of good conduct pursuant to article twenty-three of the correction law;
5. (e) The applicant or registrant is a partnership or corporation and any individual holding any position or interest or power of control therein has previously been responsible in whole or in part for any act on account of which an application for registration may be denied or a registration cancelled pursuant to the provisions of this article; or
6. (f) The maintenance and operation of the establishment of the applicant or registrant is such that the commercial feed held therein is or may be adulterated.