Yepp!! you’re correct for your jurisdiction which re-issued its own OBC (generally based on the NBC) in 2006.
With the NBC, during the period from 1995 to 2005, they broke the 5 year “new code” release cycle due to the change in philosophy of trying to get performance or “objective” based intent into the code rather than it being totally prescriptive. While working through these changes and accompanying issues, there was no “new” NBC issued in 2000 as would have been customary.
In NS, the current edition of the NBC is usually adopted by the NS Building Code Act from 1.5 to 2.5 years after it is released (the 2010 NBC is to be made law here June 1, 2011). In the period that I wrote that post (2007) , the 1995 NBC was still in place here. Later in 2007, the 2005 NBC was adopted here also- the 3.5 sones or less for range hoods requirement disappeared…the manufacturer’s were complaining it was too stringent…(read: we really can’t make them as quiet as you want!!!)
The intent of having quiet fans is to have people use them…they won’t use or leave a really noisy fan “on” for long…defeats the purpose of putting them in our newer, energy-efficient, airtight homes), doesn’t it?