Point them to or print out and hand them...
If I have a large-capacity magazine, do I need to get rid of it?
9. No. Continued possession of large-capacity magazines (able to accept more than 10 rounds) that you owned in California before January 1, 2000, is not prohibited. However as of January 1, 2000, it is illegal to buy, manufacture, import, keep for sale, expose for sale, give or lend any large-capacity magazine in California except by law enforcement agencies, California peace officers, or licensed dealers.
(PC Section 12020 (b)(19-29))
or have them read CPC 12020 12020 (b)(19-29) if literate
What Is A Veteran?
A "Veteran" -- whether active duty, discharged, retired, or reserve -- is someone who, at one point in his or her life, wrote a blank check made payable to "The United States of America," for an amount of "up to, and including his or her life."