The Robinson-Patman Act was passed in 1936, but the federal government stopped enforcing it during the deregulation of the 1980s. The FTC resumed its enforcement in December when it sued Southern Glazer’s, the largest U.S. distributor of wine and spirits.

Although there are millions of options to choose from, Americans have their preferred soda brands, with Coca-Cola, Dr. Pepper, and Pepsi being among the most popular in terms of generated revenue. Related: PepsiCo makes surprising move with irresistible snack food brand PepsiCo is an American multinational food,

The agency claims the soda giant gave “unfair” pricing advantages to a larger retailer, forcing consumers to pay more at competing stores. Pepsi “strongly disputes” the allegations.

Outgoing agency Chair Lina Khan has filed a raft of measures during her last week in office.

The US Federal Trade Commission sued PepsiCo alleging that it has engaged in illegal price discrimination by giving unfair price advantages to one retailer.

The commission alleges that the retailer, whose name was redacted in the statement from commissioners, received “unfair pricing advantages” that were not made available to others.