Contra Costa County (the "County'') maintains this Contra Costa County Deferred. 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. Example: Contra Costa. County and District. Deferred Compensation: The District offers two optional deferred compensation plans. 1. Supervisors' compensation (salary, auto allowance and deferred compensation) as of. Plaintiff Peter J. Nowicki appeals from the trial court's judgment in favor of defendant Contra Costa County Employees' Retirement Association (CCCERA). Deferred Compensation. The City offers an optional employee-paid deferred compensation 457 plan.