All depends on what the city will accept.... I imagine it will be the same for PVC conduit?
Pretty easy to look up on google.... http://www.nyc.gov/html/dob/downloads/pdf/law04047.pdf
Thier site is really cool actualy! http://www.nyc.gov/html/dob/html/model/nec.shtml
Although it may not be totaly up to date if you say they are on the 2005?, I would suspect that thier ammendments will limit use in the same way.
And / or the type of occupancy, like theaters...
Anyway, it looks clear that RNC isnt allowed except under/behind a 1 Hour barrier to any exposure. I guess it would be the same for a box.