Rule 22(a) F.R.Civ.P. applies in adversary proceedings. This rule supplements—and does not limit—the joinder of parties allowed by Rule 7020.
(As amended Apr. 23, 2008, eff. Dec. 1, 2008.)
Committee Notes on Rules—2008 Amendment
The rule is amended to conform to the changes made to the Federal Rules of Civil Procedure through the restyling of those rules effective on December 1, 2007.