Tax exemption recognition under clause (23C)(iv) grants conditional relief to Exhibition Society Hyderabad subject to compliance requirements. Notification designates Exhibition Society, Hyderabad as eligible for exemption under clause (23C)(iv) of section 10 for specified assessment years, conditional on applying or accumulating income exclusively for its objects; restricting investments to prescribed modes (except voluntary contributions retained in kind); excluding business income unless incidental and separately accounted; regular filing of income-tax returns; and on dissolution transferring surplus and assets to a similarly purposed charitable organisation.