23.1 – derivative actions by shareholders. Authorizes a shareholder derivative action to happen in federal court

20(a) – permissive joinder or parties. All persons may join in one action as plaintiffs if they assert any right to relief jointly, severally… and if any question of law or fact common to all these persons will arise in the action

13(a) – compulsory counter claims. A counter claim must be files when the claim arises out of the transaction or occurrence that is the subject matter of the opposing party’s claim. P30.

8(c) – affirmative defenses. Types of affirmative defenses that can be used. P20.

12(b)(2) – how presented. Every defense shall be asserted in the responsive pleading thereto if one is required, except that the defense of the pleader of lack of jurisdiction over person may be made by motion

1391 - Venue generally. When a venue can and cannot be used.

26 – depositions and discovery

37(c)(1) – failure to cooperate in discovery. Any evidence that was not disclosed cannot be used at trial. Other appropriate sanctions can also be made. p83