California, United States of America
The following excerpt is from People v. Young, A144481 (Cal. App. 2019):
3. Errors in the application of section 654 generally are not forfeited by failure to object in the trial court, because "a court acts in excess of its jurisdiction and imposes an unauthorized sentence when it fails to stay execution of a sentence under section 654." (People v. Hester (2000) 22 Cal.4th 290, 295.)
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