Section 26 Of Hindu Marriage Act, 1955

If the court considers it fit, the court has the power to revoke, suspend or alter the previous orders in certain cases - 

• If the applicant files a petition regarding the order related to maintenance, custody & education of the minor children
• Pending cases which are associated with the maintenance, custody & education of the minor children

Moreover, the application related to the education & custody of the child must be disposed of within 60 days after the notice.