The department issued an order on Tuesday approving the change.
It estimates that about 5% to 8% of the state's 34,000 gasoline dispensers have the older meters. Agriculture Department spokesperson Dustin Vande Hoef told AP that those stations must get replacement meters [image-nocss] by July 1, 2009.
In the meantime, stations will be allowed to sell gasoline by the half-gallon. They must still post the price by the gallon and make the changes very clear at the pumps.
The order follows similar moves in New York, Pennsylvania and Virginia.
Click the Download Now button below to view the Iowa order.Members help make our journalism possible. Become a CSP member today and unlock exclusive benefits, including unlimited access to all of our content. Sign up here.