"Foreign nationals entering the United States illegally who are taken into custody by the Border Protection Corps or by State or local law enforcement authorities must be promptly delivered to a federal law enforcement authority"

This quote by John Culberson is referring to the process of managing foreign nationals who have gotten in the United States unlawfully. It states that any foreign nationals who are apprehended by the Border Protection Corps, State or regional law enforcement authorities must be without delay delivered to a federal police authority. This suggests that the duty of managing unlawful immigrants lies with the federal government, which any state or local law enforcement authorities should move the people to the federal government as quickly as possible. This is an important part of the process of making sure that illegal immigrants are managed in a timely and efficient manner. It also serves to safeguard the rights of the people included, as they will be able to receive the appropriate legal assistance from the federal government.