The city of Lancaster is doing whatever they can to raise funds, and their latest method is particularly ruthless:
If your lawn doesn't match up to their standards you face fines of up to $500! We got a notice in the mail detailing the city codes we're breaking with pictures of our lawn; so they are definitely taking this seriously. I called into the Lancaster officer in charge of my neighborhood and she basically confessed they're doing this because of a budget shortfall.
From my conversation I have the following advice for you: don't do anything until after they've inspected (and issued a warning) your lawn. If they see progress after the inspection they will not fine you!
They are going north to south, east to west.