An Act amending the act of March 4, 1971 (P.L.6, No.2), known as the Tax Reform Code of 1971, further providing for the apportionment of business income; restoring the net operating loss carry forward; reducing the rate of corporate net income tax and the rate of capital stock and franchise tax; and providing for payment of either the corporate net income tax or the capital stock and franchise tax and for a tax study commission.