Despite guarantees of religious freedom for Christians in Article 13 of the Iranian constitution, it remains an offence to sell a copy of the Bible in Iran, which is practically impossible anyway, since the offices of the Iranian Bible Society were closed in 1980 and all its stocks confiscated by the State authorities. Despite all denials at the official level the Law on Apostasy is practised and remains in force. It is under this law that converts from Islam to other religions are subject to capital punishment.