Commonwealth, Office of Administration v. PLRB - Supreme Court - Feb. 20, 2007
http://www.courts.state.pa.us/OpPosting/Supreme/out/J-14-2006mo.pdf
Under the state Public Employee Relations Act, 43 P.S. 1101.101 et seq., a public employee has the right to be accompanied by a union representative during an interview in which the employee reasonably fears that discipline may be imposed by the employer. Such a right of accompaniment during an investigatory interview includes the employee's choice of a union representative, when the representative is reasonably available and there are no extenuating circumstances.