Seat belt that required a particular technical approach would rapidly become dated as motor manufacturers would tool up for a particular standard which could not easily be changed. For example, in 1969 there were competing designs for lap and three-point seat belts, rapidly tilting seats, and airbags being developed. But as countries started to mandate seat belt restraints the global auto industry invested in the tooling and standardized exclusively on seat belts, and ignored other restraint designs such as air bags for several decades As of 2016, seat belt laws can be divided into two categories: primary and secondary. A primary seat
Seat belt legislation 2002. The usage of seat belts is to be implemented by the respective states, with most states making seat belt usage for front seat passengers mandatory in 2002. Older vehicles that did not originally have seat belts were exempted. However, enforcement is weak in most parts of the country. In Indonesia, belts are only mandatory for front seats. Many low entry car models are not equipped with rear seat belts. In Malaysia, the first stage of safety belt laws was implemented in 1979. This was expanded in January 2009 to include rear passengers. Passenger vehicles registered prior to January 1,