[1104] Classifications under police regulations have been held valid in the following situations:
Advertising: discrimination between billboard and newspaper advertising of cigarettes, Packer Corp. v. Utah, 285 U.S. 105 (1932); prohibition of advertising signs on motor vehicles, except when used in the usual business of the owner, and not used mainly for advertising, Fifth Ave. Coach Co. v. New York, 221 U.S. 467 (1911); prohibition of advertising on motor vehicles except notices or advertising of products of the owner, Railway Express Inc. v. New York, 336 U.S. 106 (1949); prohibition against sale of articles on which there is a representation of the flag for advertising purposes, except newspapers, periodicals and books; Halter v. Nebraska, 205 U.S. 34 (1907).
Amusement: prohibition against keeping billiard halls for hire, except in case of hotels having twenty-five or more rooms for use of regular guests. Murphy v. California, 225 U.S. 623 (1912).
Barber shops: a law forbidding Sunday labor except works of necessity or charity, and specifically forbidding the keeping open of barber shops. Petit v. Minnesota, 177 U.S. 164 (1900).
Cattle: a classification of sheep, as distinguished from cattle, in a regulation restricting the use of public lands for grazing. Bacon v. Walker, 204 U.S. 311 (1907). See also Omaechevarria v. Idaho, 246 U.S. 343 (1918).
Cotton gins: in a State where cotton gins are held to be public utilities and their rates regulated, the granting of a license to a cooperative association distributing profits ratably to members and nonmembers does not deny other persons operating gins equal protection when there is nothing in the laws to forbid them to distribute their net earnings among their patrons. Corporations Commission v. Lowe, 281 U.S. 431 (1930).
Fish processing: stricter regulation of reduction of fish to flour or meal than of canning. Bayside Fish Flour Co. v. Gentry, 297 U.S. 422 (1936).
Food: bread sold in loaves must be of prescribed standard sizes, Schmidinger v. Chicago, 226 U.S. 578 (1913); food preservatives containing boric acid may not be sold, Price v. Illinois, 238 U.S. 446 (1915); lard not sold in bulk must be put up in containers holding one, three or five pounds or some whole multiple thereof, Armour & Co. v. North Dakota, 240 U.S. 510 (1916); milk industry may be placed in a special class for regulation, New York ex rel. Lieberman v. Van De Carr, 199 U.S. 552 (1905); vendors producing milk outside city may be classified separately, Adams v. Milwaukee, 228 U.S. 572 (1913); producing and nonproducing vendors may be distinguished in milk regulations, St. John v. New York, 201 U.S. 633 (1906); different minimum and maximum milk prices may be fixed for distributors and storekeepers; Nebbia v. New York, 291 U.S. 502 (1934); price differential may be granted for sellers of milk not having a well advertised trade name, Borden's Farm Products Co. v. Ten Eyck, 297 U.S. 251 (1936); oleomargarine colored to resemble butter may be prohibited, Capital City Dairy Co. v. Ohio ex rel. Attorney General, 183 U.S. 238 (1902); table syrups may be required to be so labelled and disclose identity and proportion of ingredients, Corn Products Ref. Co. v. Eddy, 249 U.S. 427 (1919).
Geographical discriminations: legislation limited in application to a particular geographical or political subdivision of a State, Ft. Smith Light & Traction Co. v. Board of Improvement, 274 U.S. 387, 391 (1927); ordinance prohibiting a particular business in certain sections of a municipality, Hadacheck v. Sebastian, 239 U.S. 394 (1915); statute authorizing a municipal commission to limit the height of buildings in commercial districts to 125 feet and in other districts to 80 to 100 feet, Welch v. Swasey, 214 U.S. 91 (1909); ordinance prescribing limits in city outside of which no woman of lewd character shall dwell, L'Hote v. New Orleans, 177 U.S. 587, 595 (1900).
Hotels: requirement that keepers of hotels having over fifty guests employ night watchmen. Miller v. Strahl, 239 U.S. 426 (1915).