Approval under section 35(1)(iii) recognizes a research institution subject to separate accounting and annual reporting obligations. The Centre for Regional Ecological and Science Studies in Development Alternatives, Calcutta, is approved as an institution under clause (iii) of sub-section (1) of section 35, contingent on maintaining separate research accounts, filing annual research returns by 31st May, submitting audited accounts and balance-sheet to the prescribed authority and tax authorities by 30th June, and applying for extension of approval at least three months before expiry; late applications risk rejection. The approval is effective from 1-4-1987 to 31-3-1990.