The State Board of Elections may employ, promote or discharge such additional persons as are necessary for the proper performance of its duties under this Code, including investigators, examiners and hearing officers. However, persons employed by the State Board of Elections prior to January 1, 1978 and previously certified under a merit plan adopted by the Board shall not be subject to any probationary period nor required to qualify by examination under “The Personnel Code” to continue in their positions. No employee or consultant may appear before the Board in any representative capacity within 6 months after termination of his employment or contractual relationship with the Board.