The registry must be informed of any changes of residence or relocations by submitting the "Declaration of residence" see Attachment 1 within twenty days from the date of relocation. Listing in the registry of residents is effective from the date of the request. Regarding what is known as "institutional cohabitation" in convents, rest homes, military barracks, prisons, and similar institutions, the person in charge of these institutions must notify the changes in residence on behalf of their occupants; the form to be used is the attached Declaration of residence in institutional cohabitation. Anyone occupying a property without legal title to it may not ask for residence or for connection to public utilities in relation to that property, and the documents issued in violation of such a prohibition are null and void for all legal purposes. So as to enable the utility providers to verify the user's information and enter it into the documents indicated in the previous paragraph, applicants are required to give utility providers suitable documentation regarding the title certifying that they own, legally possess, or legally hold the property unit, either in originals or a true copy, or else issue a declaration in lieu of affidavit pursuant to Article 47 of the consolidated act as per D.