Unfair Cigarette Sales Law; revise certain definitions under.

HB 1688 revises definitions in Mississippi's Unfair Cigarette Sales Law to gradually increase the presumed "cost of doing business" for cigarette wholesalers and retailers. It phases in higher default markup percentages: wholesalers' cost increases from 2% to 5% of basic cigarette costs over 2026-2028, while retailers' cost rises from 6% to 8%. These changes directly affect licensed cigarette wholesalers and retailers in Mississippi by altering how their minimum legal markup is calculated when selling to consumers. The bill modifies existing definitions without creating new requirements, focusing solely on adjusting these default cost percentages through specific date-based increments.