To enable the working party under the supervision of the Acceptor to proceed with the work the keys to the points of isolation which may be varied under the Permit ROSH will also be given to the Acceptor by the Issuer when the Permit ROSH is issued. The only work which shall be carried out under the Permit ROSH is the work which is specified on the ROSH procedure issued with the Permit ROSH to the Acceptor by the Issuer.