California's distraction-free driving laws went into effect in 2009 targeting text messaging, and required that law enforcement officers make a visual confirmation of what that driver is doing with their phone before issuing citations. However that created all sorts of problems when cases went to court, especially given the multi-featured nature of smartphones. The law also required extra clarification after a 2012 revision managed to exclude drivers under the age of 18 from the ban on texting. Today's ruling is likely to be filtered into additional changes to the law, or get a review from California's Supreme Court if the decision is appealed.