Research institution approval requires separate research accounts and annual returns for tax recognition. The Institute of Indian Foundrymen, Calcutta is approved for tax recognition for scientific research in other natural or applied sciences, subject to maintaining a separate account for research receipts (excluding agriculture/animal husbandry/fisheries and medicines) and furnishing an annual return of scientific research activities to the prescribed authority in the prescribed form by 30 April each year; the approval is effective from 9 February 1978 to 8 February 1981.