Subject to general rules, the Authority may, if it thinks fit, before registering a person as owner of land, require him to produce such documents of title as will in the opinion of the Authority, when stamped or otherwise marked, give notice to any purchaser or other person dealing with the land of the fact of the registration, or otherwise to satisfy the Authority that the fact of the registration cannot be concealed from a purchaser or other person dealing with the land, and may stamp or otherwise mark any documents so produced.