So this one is a bit of a trick question. Technically, the Department of Justice is responsible for enforcing ADA laws, both in general terms and those specific to signage. Still, the Department of Justice doesn’t have the time or resources to go around to every building and make sure that it is in line with the law. The task of assessing the signs falls to local code inspectors. Do not think that means you will get off easy if the building does not have the correct signage. The Department of Justice will not have any qualms about issuing fines for not having ADA-compliant signs. The first offense alone can be as much as $50,000.