Can a defendant who was serving or serving a sentence for a previous conviction that would have been a misdemeanor under Proposition 47 receive retroactive retroactive relief under section 1170.18 of the California Penal Code?

In November 2014, the electorate enacted Proposition 47, which redesignated a number of offenses as misdemeanors, and provided a procedure in section 1170.18 for retrospective comparable relief for defendants who were serving or had completed a sentence for a previous conviction that would have been a misdemeanor "had this act been in effect at the time of the offense." ( 1170.18, subds. (a), (f); People v. Johnston (2016) 247 Cal.App.4th 252, 256, review granted July 13, 2016, S235041 [cited for persuasive value pursuant to Cal. Rules of Court, rule 8.1115(e)(1)] (Johnston).)