If a High Court is satisfied-
that a foreign court situated in a foreign country wishes to obtain the evidence of a witness in any proceeding before it,
that the proceeding is of a civil nature, and
that the witness is residing within the limits of the High Court's appellate jurisdiction, it may, subject to the provisions of the rule 20, issue a commission for the examination of such witness.
Evidence may be given of the matters specified in clauses (a), (b) and (c) of sub-rule (1)-
by a certificate signed by the consular officer of the foreign country of the highest rank in India and transmitted to the High Court through the Central Government, or
by a letter of request issued by the foreign Court and transmitted to the High Court through the Central Government, or
by a letter of request issued by the foreign Court and produced before the High Court by a party to the proceeding.