Does Section 654, subdivision (a) of the California Criminal Code apply to punish an act or omission that is punishable in different ways by different sections of the law?

Section 654, subdivision (a) provides in relevant part: "An act or omission that is punishable in different ways by different provisions of law shall be punished under the provision that provides for the longest potential term of imprisonment, but in no case shall the act or omission be punished under more than one provision." Section 654 was "intended to ensure that a defendant is punished 'commensurate with his culpability'. [Citation.]" (People v. Harrison (1989) 48 Cal.3d 321, 335.)