Law may prohibit non-muslims from proselytizing in a muslim country.
A (pacifist constitution) may prohibit a military from (combat duty).
A constitution may prohibit a deployment of (combat troops).
A ruling may prohibit a male from joining political parties.
A treaty may prohibit a development of (missile defense systems).
A rule may prohibit pitchers from starting consecutive games.
A (state court rule) may prohibit some witnesses from speaking.