Summary

St. Clair v. Interstate Sand Car Transfer Company…

The means of transportation of persons and freight between the states does not change the character of the business as one of commerce, nor does the time within which the distance between the states may be traversed. Commerce among the states consists of intercourse and traffic between their citizens, and includes the transportation of persons and property, and the navigation of public waters for that purpose, as well as the purchase, sale, and exchange of commodities.
Source: Wikisource

St. Clair v. Interstate Sand Car Transfer Company…

How conflicting legislation of the two states on the subject of ferries on waters dividing them is to be met and treated is not a question before us for consideration. Pennsylvania has never attempted to exercise its power of establishing and regulating ferries across the Delaware river. Any one, so far as her laws are concerned, is free, as we are informed, to establish such ferries as he may choose. No license fee is exacted from ferrykeepers. She merely exercises the right to designate the places of landing, as she does the places of landing for all vessels engaged in commerce.
Source: Wikisource

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