Tax exemption under section 10(46) for regulatory commission income is conditional on non commerciality and prescribed filings. Notification under section 10(46) notifies Andhra Pradesh Electricity Regulatory Commission for exemption in respect of licence fee, grants in aid and interest on those receipts, subject to conditions that the Commission shall not engage in commercial activity, the activities and nature of specified income remain unchanged, and the Commission files its return of income as required by clause (g) of sub section (4C) of section 139; the notification applies to assessment years 2019 2020 through 2023 2024.