Since 2008, most other cities in and around Los Angeles and Riverside, San gabriel and Orange Counties ,Calif have adopted the same laws. that is why I asked the OP to check her city.
Heres some threads regarding L.A. on this site. In some cities animal control goes from door to door and if they see any thing that suggests you have a dog, they leave a form requiring you to call and license your pet. If you dont they come out again and again until they fine you.
Game over: Los angeles most pedigree exemptions to mandatory neuter to be removed
Help! Mandatory Spay/Neuter
City of Los Angeles