The PLAN consists of the provisions set forth in this document, and is applicable to each PUBLIC EMPLOYEE who participates in the PLAN. This type of individual retirement account is available to self-employed businesses, freelancers, and businesses with very few employees.DEFINED CONTRIBUTION PLAN . 401(a). Each tax year, you may be required to fill out Form 5500, depending on the type of plan you choose. The City's processing schedule will determine the effective date of the contribution.