To direct the United States Postal Service to designate a single, unique ZIP Code for Highland City, Utah.

HR 6399 requires the United States Postal Service to assign a single, unique ZIP Code exclusively for Highland City, Utah, within 270 days of the bill's enactment. This change would directly affect residents and businesses in Highland City by providing them with a dedicated postal code for mail delivery, separate from surrounding areas. The bill does not alter postal rates or services, only establishing a distinct ZIP Code for the city's geographic boundaries.