Gas Station Price Fixing

Does this make sense? Quoted from an AP article.

Center City BP owner Raj Bhandari has been offering senior citizens a 2 cent per gallon price break and discount cards that let sports boosters pay 3 cents less per gallon.

But the state Department of Agriculture, Trade and Consumer Protection says those deals violate Wisconsin’s Unfair Sales Act, which requires stations to sell gas for about 9.2 percent more than the wholesale price.

I’m surprised that this law is legal. I suppose it could be an effort (I’m guessing here) to keep big-chain gas stations from underpricing single-station owners and running them out of business, but the law seems to be at odds with a person involved with a civic undertaking, in this case.