Policies are created and revised using some basic steps that allow policy makers to systematically evaluate the situation and possible responses. The process starts with identifying the problem, considering available options for responding, and evaluating the costs and benefits. A policy is then drafted, further evaluated by interested parties, and, if found acceptable, formally adopted. In the United States, bills must be passed by the House of Representatives and the Senate and then signed by the president to become law. Regulations based on those laws are proposed and administered by regulatory agencies (like the Environmental Protection Agency) in a similar manner. The process itself is responsive and allows for adaptive management—reentering the policy cycle for revision as new or changing information comes to light.