The federal government passed the law that allowed Ly'ana, a federal law enforcer, to assist local law enforcement. The reason the federal government was able to pass this law is because of the commerce clause in the Constitution.
The commerce clause gives the federal government the power to regulate interstate commerce. This means that the federal government has the ability to pass laws that regulate business activities that cross state lines. In this case, the federal government passed a law that allows the federal law enforcement officers to assist local law enforcement in investigating crimes that involved the interstate commerce.
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