I also have that sticker under my hood. Mine was originally sold new in South Carolina but the last owner brought it to California where I got it used. You can register a car here that's not Cali-emissions certified and it'll pass smog/inspection but all new cars on the lots have to have the stricter emissions setup. Same deal with the Taurus I used to have- also not Cali-emissions certified.
2011 Sterling Gray Metallic 5.0 GT Premium, Manual, 3.73, Brembo, HIDs
Mods: 2010 AM GT500 wheels + Bridgestone Potenza S-04, GT500 axleback, MGW race spec, FRPP P springs, KONI STR.T struts/shocks, Steeda adj. panhard, BMR rear LCAs+relocation brackets