Cook County offers a Section 457 deferred compensation plan as a tax-deferred method for you to save for retirement. The Employer adopts this Deferred Compensation Plan for Public Employees.Please call 855-457-2665 for assistance. Beneficiary Information. If you would like to confirm or update your beneficiary information, please visit our website at CookCountyDC. Please schedule a local office in-person appointment or call us at 1-855-457-2665. A voluntary retirement savings plan that provides quality investment options, investment educational programs and related services. The following forms are applicable to eligible members of the Cook County Pension Fund (CCPF). A 457(b) plan is a tax-deferred retirement savings plan. Funds are withdrawn from an employee's income without being taxed and are only taxed upon withdrawal.