When should I use this Salary Deferral Deduction Form? Use this form to make future changes to your current account.It is a form to elect or change your contribution amount. You must have opened your account with the vendor(s) before submitting this form. Yes, the employer could allow independent contractors to participate in a 457b plan, but they are not required to do so. Sample Independent Contractor Agreement. Contractor has a Severance from Employment when the contract(s) under which the Independent. What forms must I complete to participate in DROP? You must complete Form DP-ELE, Notice of Election to Participate in the DROP and.