Alternate minimum tax defined as tax on adjusted total income with entity-specific rates and IFSC unit treatment. Definitions set the Chapter's scope: alternate minimum tax is the tax on adjusted total income with distinct rates for IFSC units, co-operative societies and other assessees; regular income-tax means the tax payable by a person on his total income under the Act excluding this Chapter. Ancillary definitions include accountant, convertible foreign exchange, International Financial Services Centre, and unit (an IFSC-established unit).