‘Sec. 1. 10 MRSA §1661-B, sub-§1, as enacted by PL 1989, c. 83, §2, is amended to read:
1. Posting required. A retail seller of fuel to be used by vehicles on public highways shall post the price make clearly visible on each pump the price of the fuel available at that pump , either by posting a sign of no less than 64 square inches and in a manner that is clearly visible to a driver approaching the pump or by a price reading, digital or analog, built into the pump that must reflect the actual price of the fuel pumped. The pump must have a sign of no less than 64 square inches on it if either the price on the pump differs from the price posted on the roadside sign due to a difference in grade of fuel or service or the retailer does not have a roadside sign. On multi-grade pumps, the posted price shall must be for the lowest priced unleaded regular gasoline. The sign should posting must indicate the difference in price for full-service, mini-service and self-service if more than one grade of service is available at that pump.’