As used in this part:

1. (1) “Buffer zone” means the distance an applicator must maintain between the field or area of application and a protected subject inside of which the subject pesticide may not be applied;
2. (2) “Custom applicator” means a commercial applicator that applies pesticides assigned the Class E or Class F designation;

3. (3) “Desirable vegetation” means any type of vegetation:

   1. (A) The pesticide label specifically identifies for protection;
   2. (B) For which the product is not labeled; or
   3. (C) For which the owner/manager desires protection from the deposition of pesticides; and
4. (4) “Drift” means off-target movement of a pesticide onto desirable vegetation, waterways, or where human health or the environment may be adversely impacted, that occurs as a result of pesticide application.