(4)Upon a transfer under sub-section (1) or sub-section (2), the insurer shall be under the same liability to the third party as he would have been to the insured person, but -(a)if the liability of the insurer to the insured person exceeds the liability of the insured person to the third party, nothing in this Chapter shall affect the rights of the insured person against the insurer in respect of the excess amount; and(b)if the liability of the insurer to the insured person is less than the liability of the insured person to the third party, nothing in this Chapter shall affect the rights of the third party against the insured person in respect of the balance amount.