hmm, thought I linked it, here ya go
and another, perhaps better one
[link|http://www.doe.state.in.us/safety/legalad.html|http://www.doe.state...fety/legalad.html]
Thus a limited public forum may be open to certain groups for the discussion of any topic, or to the entire public for the discussion of certain topics, or some combination of the two. "Once the state has created a limited public forum. its ability to impose further constraints on the type of speech permitted in that forum is quite restricted[.] Although a State is not required to indefinitely retain the open character of the facility, as long as it does so it is bound by the same standards as apply in a traditional public forum. Reasonable time, place and manner regulations are permissible, and a content-based prohibition must be narrowly drawn to effectuate a compelling state interest." Id., at 1475, citing to Perry Education Assoc. v. Perry Local Education Assoc., 460 U.S. 37, 46, 103 S.Ct. 948, 955 (1983).Once the state creates a limited public forum, ie recruiters of firms seeking employees, peace corp etc. Note again "and a content-based prohibition must be narrowly drawn to effectuate a compelling state interest" there is no compelling state/city/muni interest in restricting access to an arm of the Federal Government unless in a state of open rebellion and insurrection, although SF is constantly flirting with that, they havnt seceded yet. Case law is clear. Now they can use local laws that prohibit organizations that prohibit homosexuality to prevent recruiters but that is not settled law yet, its working its way thru the courts.
thanx,
bill