A registered will stipulated that a property would go to the mother for life, then to the son, excluding sisters. After the son and sisters provided NOCs, the property was transferred to the mother. The key questions are whether the sisters can still claim rights and if the mother can sell the property, potentially giving a share to the sisters. Legal advice suggests that based on the will, the sisters cannot claim rights, and the mother, having only a life interest, cannot validly sell the property. The son will gain absolute ownership after the mother's lifetime.