What if your CS building scope does not include HVAC equipment (and therefore no refrigerants)? USGBC requires the entire building to meet this prereq (including tenant spaces). I am not concerned about meeting it in the future, but I wonder how you prove to the USGBC that it will be met. A Tenant/Sales Agreement is only viable if there is a tenant - what can you provide in the case of a speculative building? Will the GBCI accept a notarized letter or other options?