This summary is not the rule. The rule text controls.
Here's a plain English summary:
This rule simply points out that the requirements in Rule 19 don't apply the same way when you're dealing with a class action lawsuit. Instead, class actions follow their own separate rules laid out in Rule 23.
In practical terms, this means if you're involved in a class action (a lawsuit where one or more people sue on behalf of a larger group with similar claims), you need to look at Rule 23 to understand who must be included in the case. The normal rules about which parties need to be brought into a lawsuit, found in Rule 19, take a back seat to the special rules designed specifically for class actions.
This distinction exists because class actions work differently from regular lawsuits. They involve groups of people, sometimes very large groups, and the court needs different tools to manage who represents the group, how the class gets defined, and how the case moves forward. Rule 23 provides those specific tools instead of relying on the general joinder rules meant for typical cases with a smaller, defined set of parties.
