If the seat is to carry a person it needs a seat belt. Motorhomes with side facing bench seats may not drive with passengers. There used to be an exception if the vehicle was first registered before the seat belt laws started.
T:
wasnt that the rear seat belt law introdution,
iv had quite a lot of campers and motorhomes wher the rear seatbels do not aply, but they were all old, coachbuilt motorhomes did have a lot of side faceing seats but thats not the case now,
anway no mater what the law says why would you want to put your loved ones at risk, its a known fact that seat belts save lives,
the company i work for spends thousends of pounds on crash testing, we also fit all types of seating and regulations change all the time, so whats deamed as safe one year may be a fail the next,
thats why i said depends,
just because the regulation for a certain year/ type /class said it was ok then , we know better now,
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gjonnyj sorry dude forgot to say welcome,