Part VII · Adversary Proceedings Rule 7020. Permissive Joinder of Parties Version effective 2019 Rule 20 F.R.Civ.P. applies in adversary proceedings. added in current removed in current Compared to current version (2025). Rule 20 F.Fed. R. Civ. P. 20 applies in an adversary proceedings. (As amended Apr. 2, 2024, eff. Dec. 1, 2024.)