People v. Nguyen, 222 Cal.App.4th 1168, 166 Cal.Rptr.3d 590 (4th Dist. Jan. 10, 2014) (sustaining demurrer to a misdemeanor complaint that charged violation of a local ordinance that prohibits registered sex offenders from entering city parks and recreational facilities without written permission from the city's police chief, because the state statute restricting a sex offender's daily life fully occupies the field and preempts the city's efforts to further restrict sex offenders from visiting city parks and recreational facilities and preempts the ordinance's requirement that sex offenders obtain written permission from the city's police chief before entering a city park and recreational facility).