polkit.addRule(
  function(action, subject) {
    if ( (action.id == "org.freedesktop.timedate1.set-time"      ||
          action.id == "org.freedesktop.timedate1.set-timezone"  ||
          action.id == "org.freedesktop.timedate1.set-local-rtc" ||
          action.id == "org.freedesktop.timedate1.set-ntp")
           && subject.isInGroup("@PRIVILEDGED_GROUP@") ) {
      return polkit.Result.YES;
    }
  }
);