((a)) The owner of a certificate of plant variety protection may have relief against another owner of a certificate of the same variety by civil action, and the court may adjudge the question of validity of the respective certificates, or the ownership of the certificate.
((b)) Such suit may be instituted against the party in interest as shown by the record of the Plant Variety Protection Office at the time of the decision complained of, but any party in interest may become a party to the action. If there be adverse parties residing in a plurality of districts not embraced within the same State, or an adverse party residing in a foreign country, the United States District Court for the District of Columbia, or any United States district court to which it may transfer the case, shall have jurisdiction and may issue summons against the adverse parties directed to the marshall of any district in which any adverse party resides. Summons against adverse parties residing in foreign countries may be served by publication or otherwise as the court directs. The Secretary shall not be made a party but the Secretary shall have the right to intervene. Judgment of the court in favor of the right of an applicant to plant variety protection shall authorize the Secretary to issue a certificate of plant variety protection on the filing in the Plant Variety Protection Office of a certified copy of the judgment and on compliance with the requirements of this chapter.