There is a huge difference between the federal law and the state law. The federal law is much more binding upon people, while the state laws are mostly advisory only. In the US, federal law is enforced by the United States Congress, the supreme court of the country is the ultimate decider, and all the lower courts are absolutely subject to its decisions. If there happens to be any conflict between federal law and state law, the matter is generally taken up by the federal court.I strongly suggest you to look at this site to learn more about this.
The federal law makes various changes in various sectors such as education, health care, criminal justice, labor, occupational safety etc. It has been mandated by the United States Congress that every year, all laws regarding these sectors should be reviewed and a new one issued to govern the same. In fact this review process is done for the purpose of ensuring that the working conditions and practices in the said sectors are safe for the workers. The review, therefore, becomes a lengthy one, as there are many cases that need to be reviewed for many years.
One might feel that the difference between the federal law and state law is purely a question of money; however this is not so. Every state in the country is responsible for how their laws are framed, and if those laws are not complied with, the state can legally fine the violator. Federal law, on the other hand, requires them to pay damages, and they cannot do it for punitive damages or for an amount that exceeds ten thousand dollars.