(b) SECONDARY ACTION BY SHAREHOLDERS. In an action brought to enforce a secondary right on the part of one or more shareholders in an association, incorporated or unincorporated, because the association refuses to enforce rights which may properly be asserted by it, the complaint shall be verified by oath and shall aver (1) that the plaintiff was a shareholder at the time of the transaction of which he complains or that his share thereafter devolved on him by operation of law and (2) that the action is not a collusive one to confer on a court of the United States jurisdiction of any action of which it would not otherwise have jurisdiction. The complaint shall also set forth with particularity the efforts of the plaintiff to secure from the managing directors or trustees and, if necessary, from the shareholders such action as he desires, and the reasons for his failure to obtain such action or the reasons for not making such effort.

(c) DISMISSAL OR COMPROMISE. A class action shall not be dismissed or compromised without the approval of the court. If the right sought to be enforced is one defined in paragraph (1) of subdivision (a) of this rule notice of the proposed dismissal or compromise shall be given to all members of the class in such manner as the court directs. If the right is one defined in paragraphs (2) or (3) of subdivision (a) notice shall be given only if the court requires it. Rule 24. Intervention.

(a) INTERVENTION OF RIGHT. Upon timely application anyone shall be permitted to intervene in an action: (1) when a statute of the United States confers an unconditional right to intervene; or (2) when the representation of the applicant's interest by existing parties is or may be inadequate and the applicant

is or may be bound by a judgment in the action; or (3) when the applicant is so situated as to be adversely affected by a distribution or other disposition of property in the custody of the court or of an officer thereof.

(b) PERMISSIVE INTERVENTION. Upon timely application anyone may be permitted to intervene in an action: (1) when a statute of the United States confers a conditional right to intervene; or (2) when an applicant's claim or defense and the main action have a question of law or fact in common. In exercising its discretion the court shall consider whether the intervention will unduly delay or prejudice the adjudication of the rights of the original parties.

(c) PROCEDURE. A person desiring to intervene shall serve a motion to intervene upon all parties affected thereby. The motion shall state the grounds therefor and shall be accompanied by a pleading setting forth the claim or defense for which intervention is sought. The same procedure shall be followed when a statute of the United States gives a right to intervene. When the constitutionality of an act of Congress affecting the public interest is drawn in question in any action to which the United States or an officer, agency, or employee thereof is not a party, the court shall notify the Attorney General of the United States as provided in the Act of August 24, 1937, c. 754, §1.

Rule 25. Substitution of Parties.

(a) DEATH.

(1) If a party dies and the claim is not thereby extinguished, the court within 2 years after the death may order substitution of the proper parties. If substitution is not so made, the action shall be dismissed as to the deceased party. The motion for substitution may be made by

the successors or representatives of the deceased party or by any party and, together with the notice of hearing, shall be served on the parties as provided in Rule 5 and upon persons not parties in the manner provided in Rule 4 for the service of a summons, and may be served in any judicial district.

(2) In the event of the death of one or more of the plaintiffs or of one or more of the defendants in an action in which the right sought to be enforced survives only to the surviving plaintiffs or only against the surviving defendants, the action does not abate. The death shall be suggested upon the record and the action shall proceed in favor of or against the surviving parties. (b) INCOMPETENCY. If a party becomes incompetent, the court upon motion served as provided in subdivision (a) of this rule may allow the action to be continued by or against his representative.

(c) TRANSFER OF INTEREST. In case of any transfer of interest, the action may be continued by or against the original party, unless the court upon motion directs the person to whom the interest is transferred to be substituted in the action or joined with the original party. Service of the motion shall be made as provided in subdivision (a) of this rule.

(d) PUBLIC OFFICERS; DEATH OR SEPARATION FROM OFFICE. When an officer of the United States, the District of Columbia, a state, county, city, or other governmental agency, or any other officer specified in the Act of February 13, 1925, c. 229, §11 (43 Stat. 941), U. S. C., Title 28, §780, is a party to an action and during its pendency dies, resigns, or otherwise ceases to hold office, the action may be continued and maintained by or against his succes

sor, if within 6 months after the successor takes office it is satisfactorily shown to the court that there is a substantial need for so continuing and maintaining it. Substitution pursuant to this rule may be made when it is shown by supplemental pleading that the successor of an officer adopts or continues or threatens to adopt or continue the action of his predecessor in enforcing a law averred to be in violation of the Constitution of the United States. Before a substitution is made, the party or officer to be affected, unless expressly assenting thereto, shall be given reasonable notice of the application therefor and accorded an opportunity to object.

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V. DEPOSITIONS AND DISCOVERY

Rule 26. Depositions Pending Action.

(a) WHEN DEPOSITIONS MAY BE TAKEN. By leave of court after jurisdiction has been obtained over any defendant or over property which is the subject of the action or without such leave after an answer has been served, the testimony of any person, whether a party or not, may be taken at the instance of any party by deposition upon oral examination or written interrogatories for the purpose of discovery or for use as evidence in the action or for both purposes. The attendance of witnesses may be compelled by the use of subpoena as provided in Rule 45. Depositions shall be taken only in accordance with these rules. The deposition of a person confined in prison may be taken only by leave of court on such terms as the court prescribes.

(b) SCOPE OF EXAMINATION. Unless otherwise ordered by the court as provided by Rule 30 (b) or (d), the deponent may be examined regarding any matter, not privileged, which is relevant to the subject matter involved in the pending action, whether relating to the claim or defense of the examining party or to the claim or defense of any other party, including the existence, description, nature, custody, condition, and location of any books, documents, or other tangible things and the identity and location of persons having knowledge of relevant facts.

(c) EXAMINATION AND CROSS-EXAMINATION. Examination and cross-examination of deponents may proceed as permitted at the trial under the provisions of Rule 43 (b).