default
{
    state_entry()
    {
        llSitTarget(<0, 0, 1>, ZERO_ROTATION);
    }

    changed(integer change)
    {
        if (change & CHANGED_LINK)
        {
            key id = llAvatarOnSitTarget();
            if (! llSameGroup(id))
            {
                llUnSit(id);
                llRegionSayTo(id, 0, "This seat can only be used with the correct group tag active.");
            }
        }
    }
}