The following excerpt is from Holcomb v. Altagen (In re Holcomb), Adv. No. 2:17-ap-01283-BB, BAP No. CC-17-1268-KuTaS (B.A.P. 9th Cir. 2018):
We may raise the question of subject matter jurisdiction sua sponte at any time during the pendency of the action, even on appeal and when not raised by the parties. See Snell v. Cleveland, Inc., 316 F.3d 822, 826 (9th Cir. 2002).
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