I am having the same problem with one of our State inspectors. I have talked to several factories. They all say that the housing is damp location rated and all of the trims are rated the same unless noted otherwise, i.e. 'Wet Location'. However, none of the catalogs state this and the factories import the trims from China. The trims by themselves do not have a listing.
My dilema is that without 'written proof' of damp location rating the inspector will not waiver. I am hoping that one of the factories will give me a letter stating that the housing is rated with the trim.