Public employees shall have the right to:
(1) Organize, form, join or assist any employee organization except to the extent that such right may be affected by a collectively bargained agreement requiring the payment of a service fee as a condition of employment.
(2) Negotiate collectively or grieve through representatives of their own choosing.
(3) Engage in other concerted activities for the purpose of collective bargaining or other mutual aid or protection insofar as any such activity is not prohibited by this chapter or any other law of the State.
(4) Be represented by their exclusive representative, if any, without discrimination.