49 CFR 372.223: Consolidated governments.

The zone adjacent to, and commercially a part of a consolidated government within which transportation by motor vehicle, in interstate or foreign commerce, not under common control, management, or arrangement for a continuous carriage or shipment to or from a point beyond the zone, is partially exempt from regulation under 49 U.S.C. 13506(b)(1) includes and is comprised of all points as follows:

(a) All points within the boundaries of the consolidated government.

(b) All points beyond the boundaries of the consolidated government which were at any time within the commercial zone of the formerly independent core municipality.

(c) When the present population of the formerly independent core municipality is identifiable, all points beyond the boundaries of the consolidated government which are within the territory determined by the most recent population-mileage formula measured from the limits of the formerly independent core municipality.

(d) All of any municipality wholly surrounded, or so surrounded except for a water boundary, by the consolidated government or by any other municipality included under the terms of paragraphs (a), (b), or (c) of this section.