—(1) Except as provided in subsection (2), every instrument purporting to dispose of or to create an interest in registered land shall be executed by the proprietor or proprietors thereof named in the land-register at the time of registration of the instrument.
(2) This section shall not prevent the registration of any instrument executed by —
the survivor or survivors of joint proprietors;
the personal representative of a deceased proprietor in severalty;
the attorney or other agent authorised in accordance with Part XVI;
the sheriff or other officer of a court acting under a writ, order or decree of a court of competent jurisdiction;
the proprietor under his lawfully altered name where such name is different from that registered in the land-register; or
any person empowered in that behalf, directly or indirectly, by this Act or any other written law.
(3) Before registering any instrument executed by a person other than the proprietor named in the land-register, the Registrar may require production of the instrument, authority or evidence empowering or enabling that person to execute.