What is required for supplemental jurisdiction to be applicable in cases of created third-party claims?

Supplemental jurisdiction allows federal courts to hear additional claims that are related to a case already within their jurisdiction. For this jurisdiction to apply in cases of created third-party claims, it is essential that these claims arise from the same transaction or occurrence as the original claim. This requirement ensures that the court can maintain judicial efficiency by resolving related disputes in one setting rather than forcing parties to split their claims between different courts.

When claims are related by arising out of the same transaction or occurrence, they are seen as part of a single controversy. This localizes the existing issues and helps the court provide a comprehensive resolution. If this connection were absent, it would undermine the principles of judicial economy and potentially lead to inconsistent verdicts being reached in separate cases, which courts strive to avoid.

The other conditions surrounding supplemental jurisdiction, such as diversity of citizenship or the amount in controversy, pertain to the original jurisdiction and not to the applicability of supplemental jurisdiction on its own. Therefore, they do not apply to created third-party claims in the context of this question.