I see at least 6 marinas on the list at the link provided and several airfields. At least one of them was updated in 2013.
I also looked at Indiana regulations here
Alternative Fuels Data Center: Indiana Laws and Incentives for Ethanol
I don't see any reference to laws restricting the sale of pure gasoline, just a lot of incentives to sell ethanol.
I'm just making observations here and I'm actually anti-ethanol and hate the subsidies and incentives with tax payer dollars.
Do you have a link to laws or legislation restricting the sale of gasoline without ethanol in Indiana?
Kevin