Regents of Univ. of Cal. v. PERB
JUSTICE O’CONNOR delivered the opinion of the Court.
This case presents the question whether a state university’s delivery of unstamped letters from a labor union to university employees violates the Private Express Statutes, 18 U.S.C. §§ 1693-1699, 39 U.S.C. §§ 601-606. These statutes establish the postal monopoly, and generally prohibit the private carriage of letters over postal routes without the payment of postage to the United States Postal Service.
I
Appellant Regents govern a large state-owned university with over 100,000 employees. The university (hereafter referred to as appellant) operates an internal mail system to facilitate the delivery of mail to the various sites on its campuses. Appellant’s employees collect mail originating on the campuses from many mail depositories and take it to a central location for sorting. The mail is separated into three groups: (1) mail already bearing United States postage; (2) unstamped internal university mail; and (3) other unstamped mail. Group (1) is delivered to the Postal Service without further handling by appellant. Group (2) is monitored to ensure that it includes only official university mail. Group (3) is examined for any letters addressed to university destinations that come within an exception to the Private Express Statutes and can therefore be delivered by the appellant without postage. Appellant affixes United States postage to the remainder of mail in group (3) and delivers it to the Postal Service, then charges