Nothing in this subchapter shall interfere with the right of the employer, in accordance with this subchapter to:
(1) Carry out the statutory mandate and goals assigned to a state agency by the most appropriate and efficient methods and means and utilize personnel in the most appropriate and efficient manner possible.
(2) Manage the employees of a state agency; hire, promote, transfer, assign or retain employees in positions within the agency; and in that regard establish reasonable work rules.
(3) Suspend, demote, discharge or take other appropriate disciplinary action against the employee for just cause; or to lay off employees in the event of lack of work or funds or under conditions where continuation of such work would be inefficient and nonproductive.