The Illinois Retail Merchants Association (IRMA) and a group of seven retailers filed a Temporary Restraining Order (TRO) in Cook County Circuit Court (Law Division) on Tuesday seeking to halt the county’s penny-per-ounce tax on sweetened beverages. The county is set to begin collecting the tax on July 1. The group, represented by the firm Horwood Marcus & Berk, says the tax “violates the uniformity clause of the Illinois Constitution and is impermissibly vague.”