ARTICLE VIII. POWERS OF GOVERNMENT
Section 1
A power expressly delegated to the national government, or a power of such an indisputably national character as to be beyond the power of a state to control, is a national power.
Section 2
A power not expressly delegated to the national government, or prohibited to the states is a state power.
Section 3
State and local governments are prohibited from imposing taxes which restrict interstate commerce.