California automobile service providers are now required to check tire pressures for every vehicle being maintained or repaired at their facility. The regulation, issued by the California Air Resources Board, applies to auto maintenance/repair providers but not to auto parts distributers/retailers, auto body/paint facilities, auto glass installers or wreckers/dismantlers. It went into effect September 1, 2010. The rule is intended to reduce greenhouse gas emissions associated with under-inflated tires. Service providers are required to check and inflate the tires to the recommended tire-pressure rating. The provider must note on the invoice that the tire inflation service was completed and then keep a copy of the service invoice for at least three years. The customer may decline the check if the customer affirms that a check has already been done within the last 30 days, or they will have it checked within the next seven days. The rule applies to all vehicles weighing less than 10,000 lbs.