In addition to any other provision of this code, unprofessional conduct shall constitute a basis for refusal, revocation, or suspension of an agricultural pest control license. “Unprofessional conduct” means either of the following:
- (a) Repeated acts of recommending the clearly excessive use of a pesticide or any method or device for the control of plant, animal, or other pests.
- (b) Repeated acts of recommending the use of an ineffective pesticide or any ineffective method or device for the control of plant, animal, or any other pests.