An Act amending the act of March 4, 1971 (P.L.6, No.2), known as the Tax Reform Code of 1971, in sales and use tax, further providing for definitions, for imposition of tax and for computation of tax, repealing provisions relating to exclusions from tax and further providing for alternate imposition of tax and credits and for transfers to Public Transportation Assistance Fund; and, in special taxing authority, further providing for special taxing authority.