When used in this act:
In the case of any public employer other than the State of New Jersey, "managerial executives" of a public employer means persons who formulate management policies and practices, and persons who are charged with the responsibility of directing the effectuation of such management policies and practices, except that in any school district this term shall include only the superintendent or other chief administrator, and the assistant superintendent of the district.
"Confidential employees" of the State of New Jersey means employees who have direct involvement in representing the State in the collective negotiations process making their membership in any appropriate negotiating unit incompatible with their official duties.
N.J.S. § 34:13A-3