Under the Hindu Adoptions and Maintenance Act, 1956, consent of husband is not required when he has:

The proviso to section 8 dispenses with the husband's consent where he has renounced the world "completely and finally", "has ceased to be a Hindu" or "has been declared by a court of competent jurisdiction to be of unsound mind". Separation, an absence of a year or an unreasonable refusal is not enough.