Any exemption granted in the territory of one of the Contracting Parties from stamp duty, notarial or registration fees in respect of certificates and documents required to be submitted to authorities and insurance institutions in the same territory, shall also apply to certificates and documents which, for the purpose of the implementation of this Convention, have to be submitted to authorities and insurance institutions in the territory of the other Contracting Party. Documents and certificates required to be produced for the purpose of the implementation of this Convention shall be exempted from authentication by diplomatic or consular authorities.