Seat belt laws • English Conversation Questions

What is the purpose of seat belt laws?
In what states is it a primary offense to not wear a seat belt?
In what states is it a secondary offense to not wear a seat belt?
Are there any exceptions to seat belt laws, such as for certain medical conditions?
What are the fines for not wearing a seat belt in your state?
How do seat belt laws vary for backseat passengers?
What are the statistics on the effectiveness of seat belt laws in reducing injuries and deaths in car accidents?
What are the differences between lap belts and shoulder harnesses?
What are the potential negative consequences of strict seat belt laws?
How are seat belt laws enforced?
What are the differences between seat belt laws in the United States and other countries?