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.
Lap safety belts have been mandatory standard equipment in autoÂ­. mobiles since January 1, 1968. Combined lap and shoulder safety. belts in front seats were mandated as a standard in 1973. Federal and other studies consistently have shown that, when. properly used, safety belt restraint systems are 30 to 50 percent.