Section 25
Amount of maintenance may be altered on change of circumstances
Chapter 3: Maintenance
The amount of maintenance, whether fixed by a decree of court or by agreement, either before or after the commencement of this Act, may be altered subsequently if there is a material change in the circumstances justifying such alteration.
The Hindu Adoptions and Maintenance Act, 1956 (Act No. 78 of 1956). From the updated text on India Code, with later amendments. Being checked against the official copy; amendment notes are not shown yet.