Justice Kennedy, with whom Justice Scalia joins, concurring in part and concurring in the judgment.
... The accommodation of religion mandated by the Act is a neutral one, and in the context of this case it suffices to inquire whether the Act violates either one of two principles. The first is that the government cannot "give direct benefits to religion in such a degree that it in fact 'establishes a [state] religion or religious faith, or tends to do so."' Any incidental benefits that accompany official recognition of a religious club under the criteria set forth in the [Act] do not lead to the establishment of religion under this standard. The second principle controlling the case now before us, in my view, is that the government cannot coerce any student to participate in a religious activity. The Act is consistent with this standard as well. ...
The plurality uses a different test, one which asks whether school officials, by complying with the Act, have endorsed religion. It is true that when government gives impermissible assistance to a religion it can be said to have "endorsed" religion; but endorsement cannot be the test. The word endorsement has insufficient content to be dispositive. And for reasons I have explained elsewhere, its literal application may result in neutrality in name but hostility in fact when the question is the government's proper relation to those who express some religious preference.
I should think it inevitable that a public high school "endorses" a religious club, in a common-sense use of the term, if the club happens to be one of many activities that the school permits students to choose in order to further the development of their intellect and character in an extracurricular setting. But no constitutional violation occurs if the school's action is based upon a recognition of the fact that membership in a religious club is one of many permissible ways for a student to further his or her own personal enrichment. The inquiry with respect to coercion must be whether the government imposes pressure upon a student to participate in a religious activity.
This inquiry, or course, must be undertaken with sensitivity to the special circumstances that exist in a secondary school where the line between voluntary and coerced participation may be difficult to draw. No such coercion, however, has been shown to exist as a necessary result of this statute, either on its face or as respondents seek to invoke it on the facts of this case. ...