Jeremy,
Here is a topic of previous discussion http://www.ontariohighwaytrafficact.com/topic2572.html
The subject has gone both ways (legal and illegal)
Here is the sections of the HTA
Use of seat belt assembly by passenger 106 (3) Every person who is at least 16 years old and is a passenger in a motor vehicle on a highway shall,
(a) occupy a seating position for which a seat belt assembly has been provided; and
(b) wear the complete seat belt assembly as required by subsection (5).
How to wear seat belt assembly 106(5) A seat belt assembly shall be worn so that,
(a) the pelvic restraint is worn firmly against the body and across the hips;
(b) the torso restraint, if there is one, is worn closely against the body and over the shoulder and across the chest;
(c) the pelvic restraint, and the torso restraint, if there is one, are securely fastened; and
(d) no more than one person is wearing the seat belt assembly at any one time
Now add in HTA Ontario Regulation 613
10. Where a motor vehicle manufactured without seat belt assemblies for each seating position and not modified so that there is a seat belt assembly for each seating position is driven on a highway,
(a) the driver is exempt from the requirement of subsection 106 (2) of the Act to wear a seat belt assembly if there is no seat belt assembly at the drivers seating position;
(b) a passenger is exempt from the requirement of subsection 106 (3) of the Act to wear a seat belt assembly if the passenger occupies a position without a seat belt assembly and there is no other available seating position with a seat belt assembly So the actual discussion would be focused around the very last line above (bold/underline)
- all interior seating positions MUST be occupied
- now it all comes down to what a seating position is?
One that has a physically installed proper seat? or somewhere to sit ones' behind on?
a) installed proper seat is generally enclosed and offers protection to each person from collisions and keeps them in that position. Even convertibles are built for rollover with super strong "A" pillars supporting windshield, the rear passengers are protected as they are sunk down and the "A" pillar angle to trunk is higher than the rear passengers head, plus they have seatbelts on
b) sit anywhere (back of truck) no protection from anything, wind even circulates debris into face, hard braking and who knows what might happen