Income-tax exemption under clause (23) imposes conditions on investment, distribution and incidental business income for a sports authority. The Central Government notifies the Sports Authority of Andhra Pradesh for income-tax exemption under clause (23) for specified assessment years, subject to conditions: income must be applied or accumulated solely for the authority's objects; accumulations and investments must be in permitted statutory modes (with limited exception for certain voluntary contributions in articles); income may not be distributed to members except as grants to affiliated bodies; and business profits are excluded unless incidental to objectives with separate accounting.