In the US seat belts began to show up in the later 1950's.
No they did not. Not unti the late 60's early 70's.
Not if they did not come from the factory with seat belts. If they came form the factory with seat belts you are required to wear them.
In the year 1949 seat belts became an option in cars.
in 1970
1966
Yes
no
It was the first modern seat belt that was put in cars by Volvo in 1959-1960
1950
Seat belts became a standard feature in cars starting in the late 1950s. The first production car to offer seat belts as standard equipment was the 1959 Chevrolet. However, it wasn't until the 1960s and 1970s that seat belt laws were enacted in many countries, leading to wider adoption and use in vehicles. By the 1980s, seat belts had become mandatory in most new cars.
Not necessarily. By 1964, Most U.S. automobiles were sold with standard front seat belts; rear seat belts were made standard in 1968. So there were cars sold in 1960 that did not have seat belts.
If the vehicle came equipped from the factory with belts it has to have them.