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.We are pleased to offer the 403(b) Tax Sheltered Annuity Plan and the 457(b) Deferred Compensation Plan to eligible employees. Sample Independent Contractor Agreement. The Contra Costa County Employees' Retirement Association ("CCCERA") invites organizations to submit proposals on providing IRC 457(b) Deferred. 1. Supervisors' compensation (salary, auto allowance and deferred compensation) as of. Contractor must perform under this Agreement as an independent contractor and not as a representative, employee, agent, or partner of the City. This article highlights several of the main considerations for employers when they are operating, amending or terminating a NQDC plan.