This violation does carry a suspension. Showing up to court and getting it amended to an underage possession or consumption eliminates the mandatory 90 day suspension associated with the original charge, but does not eliminate the possibility of a suspension altogether.
Consult a local attorney in your area regarding possible diversion programs, or other options for avoiding conviction altogether. Good luck.
This answer is provided for general information only. No legal advice can be given without a consult as to the specifics of the case.
I agree with my WI colleague. In CA a minor with alcohol would get their license suspended for one year. Get an attorney.
Andrew Roberts (818) 597-0633/ (805) 496-7777