ARTICLE II Union Security . Registered Nurses Unit.A. R.N. License To Practice (Also Applicable to Nurses in the Supervisory Unit). 1. Union organizers can promise you anything but the truth is there are no guarantees in collective bargaining. Employees shall participate in the County of Riverside 401(a) Temporary and Part-. Time Employees' Retirement Plan. Fill out the form to become part of this movement. Together, we'll build a country and a future that works for us all.