California, United States of America
The following excerpt is from D'Amico v. Board of Medical Examiners, 105 Cal.Rptr. 639, 29 Cal.App.3d 224 (Cal. App. 1972):
5 The notion that the statute's rational basis depends upon conditions preceding its enactment is tempered by recognition that constitutionality of a statute predicated upon a given state of facts may be challenged by proof that those facts no longer exist. (United States v. Carolene Products Co. (1938) 304 U.S. 144, 153, 58 S.Ct. 778, 82 L.Ed. 1234.)
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