On the official Montreux municipal website, find the 'Administrative Procedures' (Démarches administratives) section. Within this section, locate the page that describes the process for 'Declaring a Change of Address' (Changement d'adresse). List all the primary documents or pieces of information required to complete this address change procedure.
Navigate to 'https://www.montreux.ch/accueil' Locate and click on the 'Démarches administratives' link or section. On the 'Démarches administratives' page, find and click the link or section titled 'Changement d'adresse'. Identify and list all the primary documents or information explicitly stated as required for the change of address procedure on that page.
Successfully navigate to the 'Démarches administratives' section. Successfully access the 'Changement d'adresse' page. List all the primary documents or information required for declaring a change of address as presented on the website (e.g., 'Valid ID', 'Proof of new residence', 'Previous address details', etc.).