Nothing in this act is intended to circumscribe or modify the existing right of a public employer to:

(a) Direct the work of its employees;

(b) Hire, promote, demote, transfer, assign and retain employees in positions within the public agency;

(c) Suspend or discharge employees for proper cause;

(d) Maintain the efficiency of governmental operation;

(e) Relieve employees from duties because of lack of work or for other legitimate reasons;

(f) Take actions as may be necessary to carry out the mission of the agency in emergencies; and

(g) Determine the methods, means and personnel by which operations are to be carried on.