I've been trying to work in some statutory interpretation into my ethics class, and when I passed this sign while cycling to work I knew I had to snap a pic. As you can plainly see, "no vehicles in the park" isn't just a hypothetical. One phrase in California's ethics rules that's useful for playing the game of core-meaning-vs-peripheral-meaning is the phrase in our doing business with a client rule (3-300): "A member shall not enter into a business transaction with a client; or knowingly acquire an ownership, possessory, security, or other pecuniary interest adverse to a client, unless each of the following requirements has been satisfied . . ."