In what circumstances will a defendant be punished separately for each criminal offence committed at the same time?

This is not to say that the separate punishments were necessarily permitted. As noted above, each act for which a defendant is criminally responsible can be punished only once. Further, where multiple criminal acts are committed, a defendant can be separately punished only for those that are independent violations committed in pursuit of different criminal objectives. (People v. Perez (1979) 23 Cal.3d 545, 551, 153 Cal.Rptr. 40, 591 P.2d 63.) Both principles come into play here.