Tax exemption for bodies promoting Scheduled Castes and Tribes extends to income of wholly government financed corporations. Amendment to section 10 inserts clause (26B), deemed effective from 1 April 1972, exempting income of a corporation established by statute or any other body, institution or association wholly financed by Government where the entity is formed for promoting the interests of the members of the Scheduled Castes or the Scheduled Tribes or both; the Explanation adopts the meanings of 'Scheduled Castes' and 'Scheduled Tribes' from clauses (24) and (25) of article 366 of the Constitution.