Chennai Metropolitan Water Supply and Sewerage Board granted tax exemption on specified income, effective assessment year 2024-25. Central notification grants tax exemption on specified income to the Chennai Metropolitan Water Supply and Sewerage Board, constituted under the 1978 Act, effective from assessment year 2024-2025, subject to the continuing condition that the Board remains constituted under the Act and retains one or more of the purposes specified in the exemption clause; the explanatory memorandum certifies no person is adversely affected by retrospective effect.