The roach coach that serves up your favorite tacos will soon have a letter grade attached to it, restaurant-style (that is if it even makes the grade). At least you'll have guidelines: For authentic fare avoid “A”s.

The Los Angeles County Board of Supervisors on Tuesday gave its final approval (PDF) to applying the county's twice-yearly restaurant health inspections to food trucks. What's more, the rigs' workers will have to have access to a nearby bathroom — a tall order that could, at least if rules are strictly enforced, put some of the more down-home taco trucks out of business and give an advantage to those foodie RVs that park near office parks and such.

The inspections start in 30 days. We'll be watching.