(a) In every case before acting on any power of attorney the Registrar shall require from the attorney a declaration that he has not received notice of revocation of the power of attorney by the death of the donor of the power or otherwise.

(b) The Registrar may act on any power of attorney which in his opinion contains full power to act for any purpose in relation to stock.

(c) The Registrar may require a power of attorney to be left at the registry at least two clear days before it is acted upon.

(d) Particulars of every power of attorney left at the registry for notation shall be entered by the Registrar in a register.