To provide for a moratorium on, and study regarding, certain State tax laws.

Imposes a retroactive moratorium with respect to: (1) New York State law that takes into account income from outside that State when determining income tax liability of nonresidents; and (2) any State law enacted in response to the New York law.

Establishes the Interstate Taxation Commission, including representatives from the States of New York, New Jersey, and Connecticut, to study and report to the Congress on appropriate methods of taxing interstate income. Terminates the Commission upon submission of the required report.