Equal Access Act of 1984
U.S. Code § 4071 - Denial of equal access prohibited
(a) Restriction of limited open forum on basis of religious, political, philosophical, or other speech content prohibited
It shall be unlawful for any public secondary school which receives Federal financial assistance and which has a limited open forum to deny equal access or a fair opportunity to, or discriminate against, any students who wish to conduct a meeting within that limited open forum on the basis of the religious, political, philosophical, or other content of the speech at such meetings.
(b) "Limited open forum" defined
A public secondary school has a limited open forum whenever such school grants an offering to or opportunity for one or more noncurriculum related student groups to meet on school premises during noninstructional time.