; or (2) any tenant of property that is subject to eminent domain who suffers injury as a result of a violation of any provision of this Act with respect to that property, may report a violation by the Federal Government, any authority of the Federal Government, State, or political subdivision of a State to the Attorney General. (b) Investigation by attorney general Upon receiving a report of an alleged violation, the Attorney General shall conduct an investigation to determine whether a violation exists. (c) Notification of violation If the Attorney General concludes that a violation does exist, then the Attorney General shall notify the Federal Government, authority of the Federal Government, State, or political subdivision of a State that the Attorney General has determined that it is in violation of the Act. The notification shall further provide that the Federal Government, State, or political subdivision of a State has 90 days from the date of the notification to demonstrate to the Attorney General either that: (1) it is not in violation of the Act