This makes it imperative that real estate requires, from year to year or for a period of more than twelve months, a mandatory registration with the office of the Sub-Registrar of Insurance responsible for the location of the property for rent. Both parties, i.e. the tenant and the owner, must be present with two witnesses to be certified, in order to be able to register the deed. If all parties are not present together, he/she must sign the power of attorney that gives the agent the authority to sign the agreement.. . .