A pest control operator registration may be refused, revoked, or suspended by the commissioner, if the commissioner makes any of the following findings:
(a) That the equipment of the registrant or applicant is unsuitable.
(b) That the operators employed by him are incompetent or unqualified.
(c) That the registrant or the applicant has not complied with any provision of this division or of Division 7 (commencing with Section 12501) pertaining to pesticides, or with regulations adopted pursuant to the provisions, or with any lawful order of the commissioner.