BCF = bromochlorodifluoromethane = Halon
BCF is still permitted in aviation as there is no suitable replacement. Whilst non toxic in itself it does displace oxygen thus there is a risk of suffocation.
From my perspective, I'd rather use BCF/Halon on a fire and bugger the ozone layer, than burn a hole in the aircraft and crash.
This link shows a product that claims to be a replacement for BCF.
MOR I suppose not, though 20 years isn't all that short a time!
