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.
In what year did they start installing seatbelts in all cars. The 1st seat belts were requested by Dr.s in the '30s. They were seen regularly in the '50s, but it wasn't until 1966-68 when legislation made them mandatory.