Numerous parties.
Section 118
SEC. 118. Numerous parties. — When the subject-matter of the controversy is one of common or general interest to many persons, and the parties are so numerous that it is impracticable to bring them all before the court, one or more may sue or defend for the benefit of all. But in such case any party in interest shall have a right to intervene in protection of his individual interest, and the court shall make sure that the parties actually before it are sufficiently numerous and representative so that all interests concerned are fully protected.