(1) Subject to subsection (2) and to of section 72(2), all instruments accepted by the Registrar shall be retained in the Registry for as long as they support a current entry in the register and for 6 years thereafter.
(2) When a lease or hypothec is registered, particulars of registration shall be noted on the duplicate, and the triplicate thereof and the duplicate and the triplicate shall be returned to the person who presented them.
(3) Six years or more after an entry in the register has been superseded or has ceased to have any effect the Registrar may destroy any instrument which supported the entry.