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.
Quick Answer. The initial effective date of seat belt legislation varies according to the state. New York was the first to make seat belts a legal requirement for adults and non-infant passengers on Dec. 1, 1984. Other states followed over the next 10 years with Maine becoming the last state on Dec. 26, 1995.