Codes and Standards

This message has been cross posted to the following Discussion Forums: Codes and Standards and Housing Knowledge Community .
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Is anyone aware of a definition of 'bedroom' in federal or some national based regulation?  I'm trying to determine if a loft sleeping mezzanine can be counted as a 'bedroom' in an publicly subsidized affordable housing project. 

I know there are many definitions of bedroom related to septic system demand (varies a lot by jurisdiction), and some definitions along similar lines which reference closets and egress windows in local zoning ordinances and ccr's.  Egress windows and closets are not required in the building code for 'sleeping mezzanines'. The building code has minimum dimensions for a bedroom ... but it does not define the term as requiring a 'door' to distinguish it from a 'studio unit' as far as I can tell. 

Thanks for any leads.

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Michael Malinowski AIA
AIA Director - California Region
Applied Architecture, Inc.
Sacramento CA
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