Revise and clarify the law regarding apportionment of fault

HB 303 amends Montana's civil procedure law to clarify how fault is assigned in negligence cases involving multiple parties. The bill allows any party in a lawsuit to argue that a non-party (someone not named in the case) caused all injuries, without needing to seek fault apportionment from that non-party. It also specifies how courts must consider settlements or releases with other parties when calculating each defendant's share of responsibility. This directly affects plaintiffs, defendants, and third parties involved in personal injury, property damage, or product liability lawsuits. The changes aim to simplify fault allocation while ensuring released parties' roles are properly evaluated.