What is the test for a motion alleging that a section of the California Criminal Code is vague or ambiguous?

"Due process requires a reasonable degree of certainty in legislation, especially in the criminal law.... [Citations.] Thus, a statute must be definite enough to provide (1) a standard of conduct for those whose activities are proscribed and (2) a standard for police enforcement and for ascertainment of guilt. [Citation.] ... [p] ... In order to succeed on a facial vagueness challenge to a legislative measure that does not threaten constitutionally protected conduct ... a party must do more than identify some instances in which the application of the statute may be uncertain or ambiguous; he must demonstrate that the law is impermissibly vague in all of its applications. [Citations.] Defendant cannot pass this test." (People v. Kelly (1992) 1 Cal.4th 495, 533-534, 3 Cal.Rptr.2d 677, 822 P.2d 385, internal quotation marks omitted.) ⁶