Concessional tax regime broadened to include additional persons while tightening deduction and option rules for computation. Amendment inserts sub-section (1A) in section 115BAC to extend the concessional slab-based tax regime to individuals, HUFs and specified non-individual persons, subject to exclusion where an option under sub-section (6) is exercised; it restricts specified exemptions and deductions for computation of total income under that sub-section, prescribes transitional adjustment to written down value for incomplete depreciation, and modifies eligibility and option mechanics including special treatment for IFSC Units and procedural conditions for exercising or withdrawing the option.