Multiple system atrophy is a complex condition that is likely caused by the interaction of multiple genetic, environmental, and lifestyle factors. Some of these factors have been identified, but many remain unknown.
Mandatory Seatbelts According to the U.S. Department of Transportation, in July 1984, New York State passed the first mandatory seatbelt law in the nation, followed by New Jersey, Illinois, Missouri, Michigan, and New Mexico.
These were the four point belts that had two separate buckles, however. Three-point front seat lap and shoulder belts (single point release) became standard in response to revised Federal requirements on 1-1-72. Starting with the '74 model year, those front seat lap and shoulder belts also got seat belt retractors.