The acts of the Legislature of the State of New York, granting to Robert R. Livingston and Robert Fulton the exclusive navigation of all the waters within the jurisdiction of that State, with boats moved by fire or steam, for a term of years, are repugnant [in opposition] to that clause of the constitution of the United States, which authorizes Congress to regulate commerce, so far as the said acts prohibit vessels licensed, according to the laws of the United States, for carrying on the coasting trade, from navigating the said waters by means of fire or steam. —Gibbons v. Ogden, (1824)
22.
What is the significance of this decision?
State governments may regulate the type of transportation used on rivers within state borders.

The Constitution does not expressly grant the federal government the power to regulate commerce.

States have the power to regulate commerce between one another.

Only the federal government has the power to regulate interstate commerce.