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 exclusions from sales tax, for discount and for exemption certificates, for incidence and rate of tax, for floor tax and for commissions on sales; providing for the taxation of tobacco products; imposing a tax on the extraction of natural gas; providing for natural gas severance registration certificate, for duties of the Department of Revenue, for tax assessments and tax liens; imposing penalties; providing for service of process, for rulemaking, for cooperation with other governments and for bonds; and making an appropriation.