Ill. Admin. Code tit. 8, § 250.150
a) Pesticide dealers shall retain a record of all sales of restricted use pesticides or pesticides that the Director has declared to be a pesticide requiring a permit for two (2) years. The record shall include, but is not limited to, the following for each individual sale of such a pesticide:
b) Certified commercial applicators and operators shall keep a record of all restricted pesticide usage for two (2) years. The record shall include, but is not limited to, the following for each individual use of a restricted use pesticide:
(Source: Amended at 12 Ill. Reg. 12784, effective July 26, 1988)