Not a legal expert, but even though I live in Canada, this topic seems to be the same for Canada and USA. I believe motorhomes, because they are based on truck chassis, come under the same guidelines as trucks, versus the car industry. None of the new trucks (and I mean bigger than pickups and commercial vans) have air bags.
Also, even though Canadian cars have had daytime running lights as standard equipment for many years (back since late 1980's) new trucks have not and do not always follow this same rule. The detailed specs for my Ford V-10 on my 2010 Georgetown 330TS said it should have daytime running lights, but it doesn't.
And further, whereas other new vehicles for sale in Canada have metric speedometers, at a recent RV show in Toronto, ALL brands of motorhomes are being sold in miles per hour and their odometers are recorded in miles. Seems the largest percentage of motorhomes are being built in Indiana, and most are sold in the USA, so no one is converting the Canadian versions.