New York Consolidated Laws, Environmental Conservation Law - ENV § 33-0909. Denial or revocation of certification or registration

a. any statement in the application or upon which the certificate or registration was issued is or was false or misleading;

b. the applicant or certified applicator has been convicted of a felony;

c. the applicant, certified applicator, or registered business or agency applied or used any pesticide contrary to the registered label usage;

d. the applicant, certified applicator, or registered business or agency has engaged in fraudulent business practices in the application of pesticides;

e. the applicant, certified applicator, or registered business or agency has failed to comply with any provision of this article or rules and regulations of the department made pursuant thereto;  or

f. the applicant or certified applicator has failed to demonstrate that he has sufficient knowledge and experience concerning the proper use and application of pesticides.