The County offers a voluntary Deferred Compensation Plan in accordance with Section 457 of the Internal Revenue Code. The Contra Costa County Employees' Retirement Association ("CCCERA") invites organizations to submit proposals on providing IRC 457(b) Deferred.Submit your forms as follows: 1) Inquries and questions can be sent via email to the Plan. 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 Funds are withdrawn from an employee's income without being taxed and are only taxed upon withdrawal.