Section 26(3) in The University Grants Commission Act, 1956
(3)The power to make regulations conferred by this section except clause (i) and clause (j) of sub-section (1) shall include the power to give retrospective effect from a date not earlier than the date of commencement of this Act, to the regulations or any of them but no retrospective effect shall be given to any regulation so as to prejudicially affect the interests of any person to whom such regulation may be applicable.