Deduction eligibility period extended for infrastructure undertakings under section 80-IA, applying to assessments from the following year. Amendment extends the temporal eligibility for tax deductions under section 80-IA by substituting the terminal date in sub-section (4), clause (iv) to lengthen the period during which an undertaking may qualify. The extension applies to undertakings that commence power generation or generation and distribution, commence transmission or distribution by laying new networks, or undertake substantial renovation and modernisation of existing transmission or distribution networks, and is effective from the beginning of the subsequent fiscal year for the relevant assessment years.