California, United States of America
The following excerpt is from People v. Gregg, C077234 (Cal. App. 2015):
2. Lack of an objection does not constitute a forfeit of section 654 application. Because a trial court acts in excess of its jurisdiction and imposes an unauthorized sentence when it erroneously fails to stay execution of a sentence subject to the multiple punishment ban, a claim of error on that ground is not forfeitable. (People v. Le (2006) 136 Cal.App.4th 925, 931.)
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