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For the purpose of determining commercial zones, utilizing the general population-mileage formula as set forth in §372.241, each of the following combinations of cities shall be considered as a single municipality:
(a) Having a population equal to the sum of their combined populations, and
(b) Having boundaries comprised of their combined corporate limits, with the common portion thereof disregarded:
(1) Bluefield, Va.-W. Va.
(2) Bristol, Va.-Tenn.
(3) Davenport, Iowa, and Rock Island and Moline, Ill.
(4) Delmar, Del-Md.
(5) Harrison, Ohio-West Harrison, Ind.
(6) Junction City, Ark.-La.
(7) Kansas City, Mo.-Kansas City, Kans.
(8) Minneapolis-St. Paul, Minn.
(9) St. Louis, Mo.-East St. Louis, Ill.
(10) Texarkana, Ark.-Tex.
(11) Texhoma, Tex.-Okla.
(12) Union City, Ind.-Ohio.
[41 FR 56654, Dec. 29, 1976, as amended at 62 FR 15422, Apr. 1, 1997]