Section 25 of the Hindu Adoptions and Maintenance Act, 1956, gives the court the power to alter the amount of maintenance awarded, whether fixed by a decree of court or by an agreement, if there is a material change in circumstances. The question of whether this statutory right overrides a prior agreement was decided by the Supreme Court in the case of Sesi Ammal v. Thaiyu Ammal. The court held that the right to claim alteration of the maintenance amount under Section 25 is a statutory right, and it cannot be taken away or defeated by any private agreement to the contrary. The statute supersedes the contract.