Cell-Site Simulator Warrant Act of 2025
- Sponsor
- Sen. Wyden, Ron [D-OR]
- Committees
- Judiciary Committee (primary)
- Last action
- Jul 29, 2025
Bottom line
The bill aims to significantly restrict the use of cell-site simulators by requiring warrants and establishing robust oversight and accountability mechanisms to protect privacy while allowing for use in specific, tightly controlled circumstances.
What it actually does
This bill prohibits the knowing use of cell-site simulators in the United States by any individual or entity, and by the intelligence community against U.S. persons abroad, unless specific exceptions are met. It establishes a warrant requirement for law enforcement use, detailing strict application criteria, emergency exceptions, and mandates disclosures regarding potential service disruptions and third-party testing. The bill also includes provisions for civil action against unlawful use, administrative discipline, and requires annual reports from Inspectors General on compliance.
Proponents argue
Supporters argue that this bill is essential for protecting the privacy and Fourth Amendment rights of individuals by requiring judicial oversight for the use of powerful surveillance technology. They contend that cell-site simulators, which can indiscriminately collect data from many devices, necessitate strict warrant requirements to prevent widespread warrantless surveillance and ensure that law enforcement tools are used responsibly and transparently.
Opponents contend
Opponents may argue that the bill places undue restrictions and bureaucratic hurdles on law enforcement and intelligence agencies, potentially hindering their ability to effectively investigate serious crimes, respond to emergencies, or conduct vital national security operations. They might contend that the strict warrant requirements and data destruction mandates could delay critical operations and allow criminals or foreign adversaries to evade detection.
The bill is moderately complex due to its legal language and detailed exceptions, requiring focused attention. An informed reader can understand its core provisions within the estimated time, but a deeper dive into its cross-references and technical definitions would require more time.
Section 2(a), adding 18 U.S.C. 3119(a)-(c)
Prohibition on Cell-Site Simulator Use and Penalties
This provision makes it unlawful for any individual or entity to knowingly use a cell-site simulator in the United States, or for the intelligence community to use one outside the U.S. if the subject is a U.S. person. Violators face a fine of up to $250,000. Additionally, any information or evidence obtained through unlawful use of a cell-site simulator is generally inadmissible in court proceedings.
Supporters argue
Proponents argue that a clear prohibition with significant penalties is necessary to deter unauthorized surveillance and uphold constitutional rights, establishing a strong baseline for privacy in the digital age.
Critics contend
Opponents may contend that a blanket prohibition, even with exceptions, could be overly restrictive, potentially hindering legitimate investigative efforts and making it more difficult to track dangerous individuals or threats.
Tradeoffs
This provision balances the public's right to privacy against the government's need for effective surveillance tools, setting a high bar for the use of cell-site simulators.
Section 2(a), adding 18 U.S.C. 3119(d)(1)(A)
Warrant Requirement for Law Enforcement Use
This section establishes a strict warrant process for law enforcement agencies to use cell-site simulators. A court can only issue a warrant if other investigative procedures have failed or are too dangerous/unlikely to succeed. The application must specify the likely area and time of effect, certify it's the narrowest possible, and demonstrate compliance with FCC rules. Warrants are limited to 30 days, with extensions possible under the same strict criteria.
Section 2(a), adding 18 U.S.C. 3119(d)(1)(B)
Emergency Use Exception
Law enforcement can use a cell-site simulator without a prior warrant in emergencies involving immediate danger of death or serious physical injury, organized crime, or national security threats, if a warrant could be obtained and an application is filed within 48 hours. Special provisions exist for locating lost/missing persons or disaster victims. Use must terminate if the information is obtained or the warrant application is denied, with evidence destruction and notice if denied.
Section 2(a), adding 18 U.S.C. 3119(d)(1)(C)
Required Disclosures in Warrant Applications
Any application for a cell-site simulator warrant (including emergency applications) must include specific disclosures. These include potential disruptions to emergency calls (9-1-1, suicide hotline, poison control), a certification that the specific simulator model has been inspected by an FCC-recognized accredited lab to verify disclosure accuracy, methods to minimize disruption (e.g., time limits, transmission range limits), and whether the simulator will be used at gatherings involving constitutionally protected activity.
Section 2(a), adding 18 U.S.C. 3119(d)(1)(D)
Post-Surveillance Notice Requirement
Within a reasonable time (generally 90 days) after a warrant application is denied or a warrant period terminates, the judge must serve an inventory notice on named persons and potentially other affected individuals. This notice must include the fact of the warrant/application, dates, and whether their device was affected, location tracked, or communications intercepted. Notice can be postponed for good cause via an ex parte showing.
Section 2(a), adding 18 U.S.C. 3119(d)(5)
Contraband Interdiction System Exception for Correctional Facilities
This provision exempts contraband interdiction systems used in correctional facilities from the general prohibition on cell-site simulators, provided certain conditions are met. These conditions include restricting transmissions to facility property, posting signs informing visitors and staff, complying with FCC regulations, annually testing and evaluating compliance, and reporting any identified issues to the FCC within 10 business days.
Section 2(a), adding 18 U.S.C. 3119(f)
Minimization Procedures and Data Destruction
The Attorney General is required to adopt and publicly release specific procedures designed to minimize the acquisition, retention, and prohibit the dissemination of information obtained through cell-site simulator use (under warrant or FISA exceptions) that pertains to any person not an authorized subject. Any such non-target information, including metadata, must be destroyed at the earliest possible opportunity.
Section 2(a), adding 18 U.S.C. 3119(i)
Civil Action for Unlawful Use
Any person subjected to an unlawful operation of a cell-site simulator can bring a civil action in a court of competent jurisdiction. This includes actions against individuals or governmental entities that conducted the unlawful operation. Available relief includes declaratory and injunctive relief, actual damages, statutory damages of up to $500 per violation, and attorney fees.
The definition of 'derived' for the exclusionary rule explicitly states that information or evidence is 'derived' if the government would not have originally possessed it 'but for' the use of a cell-site simulator, and explicitly rejects claims of 'attenuated,' 'inevitable discovery,' or 'subsequently reobtained through other means.'
Section 2(a), adding 18 U.S.C. 3119(k)(6)
Why it matters:This is a technical legal definition, often placed in a definitions section. However, its specific language significantly strengthens the exclusionary rule beyond typical interpretations, making its placement consequential.
Case for: Proponents argue that this expansive definition of 'derived' is necessary to prevent law enforcement from circumventing the exclusionary rule through legal doctrines like inevitable discovery or attenuation, thereby ensuring that illegally obtained evidence cannot be used in court.
Case against: Critics may argue that this broad definition could lead to the suppression of evidence that would have been discovered through lawful means, even if initially touched by an unlawful cell-site simulator use, potentially hindering prosecutions.
Estimated impact: This provision has a major impact on the admissibility of evidence in cases where cell-site simulators are used, potentially leading to more evidence being suppressed if initial use was unlawful.
This subsection mandates that for certain uses of cell-site simulators not conducted pursuant to a full warrant (specifically emergency uses under (d)(1)(B) or certain FISA authorities), the disclosures required under (d)(1)(C)(i) and (ii) (regarding potential service disruption and third-party testing) must still have been included in an *approved* warrant or order application for that specific model of cell-site simulator.
Section 2(a), adding 18 U.S.C. 3119(e)
Why it matters:It's a technical compliance requirement that ensures safety and transparency disclosures apply broadly, even to uses that might otherwise have less stringent upfront judicial review. Its technical nature makes it suitable for a cross-referencing section.
Case for: Proponents argue this ensures that even in emergency or national security contexts, the potential public safety impacts of a specific cell-site simulator model have been vetted and disclosed to a court at some point, preventing the use of untested or unsafe devices.
Case against: Opponents might argue that this adds an additional layer of administrative burden to emergency or FISA operations, potentially delaying critical actions if a specific model's disclosures haven't been previously approved in a warrant context.
Estimated impact: This provision ensures that the safety and transparency checks for cell-site simulators are applied to all authorized uses, not just those under a standard warrant, enhancing overall accountability.
Any information acquired through the operation of a cell-site simulator, or derived from such information, must be disclosed to the defendant in any action where that information is introduced into evidence.
Section 2(a), adding 18 U.S.C. 3119(g)
Why it matters:It's a standard due process requirement for evidence used in court. Its placement is typical for procedural rules, but its impact on discovery can be significant.
Case for: Proponents argue this is a fundamental aspect of due process and a fair trial, ensuring that defendants have access to all evidence used against them, especially from complex surveillance technologies.
Case against: Critics may argue that such broad disclosure could reveal sensitive investigative techniques or the capabilities of cell-site simulators to criminal organizations, potentially compromising future operations.
Estimated impact: This provision strengthens a defendant's right to discovery and ensures transparency regarding the use of cell-site simulator evidence in court.