In a derivative action, the plaintiff must be a partner at the time of bringing the action and (1) at the time of the transaction of which he complains or (2) his status as a partner had devolved upon him by operation of law or pursuant to the terms of the partnership agreement from a person who was a partner at the time of the transaction.
Mass. Gen. Laws ch. 109, § 57
Proper plaintiff
Known as the Uniform Limited Partnership Act
The act spans §§ 109–109 (69 sections).
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.