N.Y. Railroad Law § 62

§ 62. Sleeping and parlor cars. Any railroad corporation may contract\nwith any person, association or corporation for the hauling by the\nspecial or regular trains of said railroad corporation, the parlor,\ndrawing-room or sleeping car or cars of such person, association or\ncorporation, in which extra accommodations shall be furnished, for which\nsaid person, association or corporation furnishing such parlor,\ndrawing-room or sleeping car or cars, may charge for the carriage and\ntransportation of persons and property therein, a reasonable\ncompensation for such extra accommodation, in addition to the fare and\ncharges now allowed by law for the carriage and transportation of\npassengers and property in the ordinary cars of said railroad\ncorporation. But said railroad corporation so contracting shall be\nliable in the same way and to the same extent as if the said car or cars\nwere owned by it, and shall furnish sufficient ordinary cars for the\nreasonable accommodation of the traveling public.\n