This bill amends the Middle Class Tax Relief and Job Creation Act of 2012 to streamline the process for modifying existing wireless facilities. It establishes a strict 60-day timeframe for State and local governments to review and decide on eligible facilities requests. If a government fails to approve a request or provide a specific determination that it is not an eligible facilities request within this period, the request is automatically deemed approved. The legislation includes provisions for tolling the 60-day timeframe if a request is incomplete. Governments must provide written notice of incompleteness within 30 days for initial requests, or 10 days for supplemental submissions, clearly identifying missing information and citing a publicly available rule. However, governments are prohibited from requiring information not reasonably related to determining eligibility or not specified in public rules, and cannot impose pre-application steps. The timeframe can also be tolled by mutual agreement. The bill clarifies that a request is considered submitted when the requesting party takes the first procedural step, preventing governments from delaying the start of the review period. To ensure compliance, requesting parties can bring an action in U.S. district courts for enforcement, with such actions to be considered on an expedited basis. The Federal Communications Commission is mandated to issue final rules to implement these amendments within 180 days of the bill's enactment.