You may want to use the California AG's Web Site to report the apparent legal risk to the City of Grand Terrace by the continued use of a Code limiting the Political Speech of its citizens and I dare say Businesses in the community.
With the recent Supreme Court Ruling regarding the extent that Businesses have the right to Political Speech the anti Political Sign Code or Limit on Political Signs also affects Businesses.
Perhaps if you all wrote or emailed http://ag.ca/gov/contact/complaint_form.php?complt=PL there may be a way that the City Council could be moved to make the code to be in agreement with legal court precedents and the State and Federal Constitutional Law without it costing the city the expense of a law suit that Ferre, Cortes and Former City Manager seem to welcome.
It may have to go to a federal level of complaint perhaps to the FBI or the AG's Office...