"Managerial employee" means an individual who formulates and effectuates management policies by expressing and making operative the decisions of the individual's employer.
"Supervisory employee" means an individual having authority, in the interest of the employer, to hire, transfer, suspend, lay off, recall, promote, discharge, assign, reward, or discipline other employees, or responsibility to direct them, or to adjust their grievances, or effectively to recommend such action, if in connection with the foregoing the exercise of such authority is not of a merely routine or clerical nature, but requires the use of independent judgment.
HRS § 378-2.7