NFPA 96-2004 Chapter 3 Definitions 3.2.1 * and 3.2.2* and 3.2.3 and 3.2.4*and 3.3.1and 7.4.3 will explain all of this. I assume all of use have a copy of NFPA 96-2004? Unless your state or local jurisdiction has adopted this model code into law, it is not law.
A.3.2.1 Approved. NFPA does not approve, inspect, or certify any installations,processes, equipment, or material Remember this when any one claims to have NFPA approval, because NFPA does not approve any thing, even $16,000 schools.
Douglas Hicks
General Fire Equipment Co of Eastern Oregon, Inc
NFPA Member 0123425