New Tax regime i.e. "propagated as concessional tax rate" has been introduced in Finance Act which provide options to taxpayer to adopt any one of the two options and pay tax accordingly. A lot of deductions/allowance which were availed earlier by the tax payer shall be forgone.
Section 115BAA and section 115BAB are introduced for company assessee and section 115BAC and Section 115BAD have been brought for assessee, being an Individual, HUF and Co-operative society. so that tax payer can opt for concessional tax rate regime subject to fulfillment of various conditions given in these sections.