I haven't either - but I suspect it's overlapping with the apprentice/minor hunting thing. When my son and I started hunting and he didn't have a full license, it was very clear that we were only allowed one firearm between us. Perhaps that requirement is not the case when the two hunters are both adults - but everything I was told during our hunting course was that with a minor apprentice hunter it was absolutely one firearm.
Which was really a pita since we were bow hunters at the time, and we could only bring one bow out (and his bow at the time was way smaller than me).