California Code, Labor Code - LAB § 1695.55

(a) Every person acting in the capacity of a farm labor contractor shall provide any grower with whom he or she has contracted to supply farmworkers a payroll record for each farmworker providing labor under the contract.  The payroll record shall include a disclosure of the net and gross wages, total hours worked, and total hourly and piece rate earnings for each farmworker.

(b) Each grower entering into a contract with a farm labor contractor shall retain a copy of the payroll record provided by the contractor for a period of three years after the contract has ended.