The statement that accurately analyzes how a new law is enacted after it is passed by Congress and signed by the president is:
Federal agencies develop rules in accordance with the Administrative Procedure Act of 1946 to effectively implement the new law.
This statement correctly describes the process by which federal agencies create regulations to enforce and implement the laws that Congress has passed and the president has signed. The Administrative Procedure Act outlines the process agencies must follow to create these rules, including public notice and comment periods.