From The Hindu Marriage Act -
9. Restitution of conjugal right.
When either the husband or the wife has, without reasonable excuse, withdrawn from the society of the other, the aggrieved party may apply, by petition to the district court, for restitution of conjugal rights land the court, on being satisfied of the truth of the statements made in such petition and that there is no legal ground why the application should not be granted, may decree restitution of conjugal rights accordingly.
Explanation.-Where a question arises whether there has been reasonable excuse for withdrawal from the society, the burden of proving reasonable excuse shall be on the person who has withdrawn from the society.
13 (1A) Either party to a marriage, whether solemnized before or after the commencement of this Act, may also present a petition for the dissolution of the marriage by a decree of divorce on the ground-
(ii) That there has been no restitution of conjugal rights as between the parties to the marriage for a period of one year or upwards after the passing of a decree for restitution of conjugal rights in a proceeding to which they were parties.