French to English Other Construction / Civil Engineering

I'm working on some specifications applicable to tenants of retail outlets in a shopping centre. The specifications detail all of the requirements imposed on tenants when fitting out their shops, installing false ceilings, etc. There is a section on "Vitrines", which reads as follows: "Tous les **arrières de vitrines**, les plafonds ainsi que les installations d'éclairage sont à la charge du Preneur. Aucun élément de la devanture, fixe ou mobile, ni aucun présentoir, gondole, etc... ne doit dépasser la limite de la parcelle sur les mails. Les vitrines devront respecter les prescriptions visées dans le règlement des enseignes, graphismes et sigles". Any suggestions would be much appreciated as I can't figure out whether they're talking about the windows themselves, window displays or something else. Thanks very much for taking the time to look at this! I have posted the question in the field of construction but am afraid that I'm unsure as to whether it should come under 'marketing'.