Agent of persons under disability
21. (1) The expression “agent duly authorised in his behalf,” in sections 19 and 20, shall, in the case of a person under disability, include his lawful guardian, committee or manager, or an agent duly authorised by such guardian, committee or manager to sign the acknowledgement or make the payment.
(2) Nothing in the said sections renders one of several joint contractors, partners, executors or mortgagees chargeable by reason only of a written acknowledgment signed or of a payment made by, or by the agent of, any other or others of them.
(3) For the purposes of the said sections-
(a) an acknowledgment signed, or a payment made, in respect of any liability, by, or by the duly authorised agent of, any widow or other limited owner of property who is governed by the Hindu law, shall be a valid acknowledgment or payment, as the case may be, as against a reversioner succeeding to such liability; and
(b) where a liability has been incurred by, or on behalf of, a Hindu undivided family as such, an acknowledgment or payment made by, or by the duly authorised agent of, the manager of the family for the time being shall be deemed to have been made on behalf of the whole family.