California, United States of America
The following excerpt is from People v. Bateman, B233984 (Cal. App. 2012):
5. There were actually five amendments to section 4019, but for the sake of convenience, the three 2011 amendments that became operative on the same date (Oct. 1, 2011) will collectively be referred to as the third amendment. When a statute is given both an effective date and an operative date, the effective date is the date on which the statute becomes a law, and the operative date is the date on which the statute may be actually implemented. (People v. McCaskey (1985) 170 Cal.App.3d 411, 415-419.)
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