Thanks!
That California code oddity made me curious...I think it is this code section from the California Food and Agriculture code.
62093. The giving of any milk, cream, dairy product, service, or
article of any kind, except to a bona fide charity, for the purpose
of securing or retaining the market milk business of any customer is
an unlawful trade practice.
http://www.leginfo.ca.gov/cgi-bin/di...=62091-62095.1