What does 8 U.S.C. 1357(g) (287(g)) require for a valid state–federal agreement and how have courts evaluated those agreements?

Checked on February 7, 2026
Disclaimer: Factually can make mistakes. Please verify important information or breaking news. Learn more.

Executive summary

8 U.S.C. § 1357(g) (commonly called “287(g)”) authorizes the Attorney General (and now DHS under delegated authority) to designate state or local officers to perform functions of immigration officers, but it conditions that authority on written agreements and supervision; the statutory text and ICE model Memorandum of Agreement set out the design, training, and supervisory framework for those deputations [1] [2] [3]. Public-interest groups and policy analysts contend the program has been implemented in ways that shift immigration enforcement to local police and produce costs and civil‑liberties concerns, but the supplied reporting does not include a sampling of judicial opinions evaluating the statutory or contractual requirements [4] [5].

1. What the statute actually says: delegation, authority, and limits

The statute gives “any officer or employee of the Service designated by the Attorney General” authority to exercise immigration‑enforcement powers—including warrantless arrests in certain circumstances and other powers—so long as those officers are “authorized under regulations prescribed by the Attorney General” and are performing duties related to immigration‑law enforcement at the time [1] [2]. In short, Congress authorized federal designation of non‑federal officers to carry out immigration functions, but framed that authorization as contingent on executive‑branch regulations and authorization rather than an unconditional grant to local governments [1] [2].

2. How ICE operationalizes 287(g): the Memorandum of Agreement framework

ICE operationalizes the delegation through written Memoranda of Agreement (MOAs) that formalize roles, training, supervision, reporting, and program models—examples include the Jail Enforcement Model MOA that specifies parties, responsibilities, and oversight mechanisms required for a valid local‑federal partnership [3]. Those MOAs are implementation documents: they spell out that deputized officers must be trained, work under ICE supervision, and adhere to procedures set by DHS/ICE, translating statutory delegation into operational controls [3].

3. What critics and policy analysts say about implementation and focus

Civil‑liberties groups argue that 287(g) effectively turns local police into ICE agents and creates risks to public safety and individual rights, framing the agreements as a “disaster for civil liberties” and a financial burden on localities (ACLU reporting) [4]. Policy organizations also contend the program historically was costly to local governments and often did not focus enforcement on serious criminals, raising concerns that MOA terms and local practices produced mission creep away from the statutory focus on serious immigration‑related offenses (American Immigration Council) [5].

4. Political and policy pushback at the state level

Several state and municipal actors have moved to limit or terminate local 287(g) relationships; for example, New York’s governor proposed voiding existing MOAs and prohibiting future ones as part of a larger policy directive—illustrating that the validity of agreements is not only a legal question but a political and administrative one shaped by state executives’ priorities [6]. Those moves underscore that while the statute authorizes delegation, actual continuation of programs depends on local political choices and statewide policy constraints [6].

5. How courts have evaluated these agreements — limits of the supplied reporting

The supplied documents establish what the statute permits and how ICE frames agreements, and they relay criticisms and policy outcomes, but they do not include excerpts or summaries of judicial opinions addressing the legal validity, preemption questions, or constitutional challenges to specific MOAs or to § 1357(g) implementations; therefore this account cannot authoritatively state how courts have treated 287(g) disputes on sovereignty, preemption, or civil‑rights grounds based on the provided sources [3] [1] [2] [4] [5]. Because the present reporting omits case law, further research into federal decisions and circuit opinions is required to assess how courts have interpreted statutory delegation, the enforceability of MOA terms, and constitutional challenges.

6. Bottom line and where accountability matters

Statutory text empowers federal designation but contemplates executive regulation and written agreements; ICE’s MOAs operationalize training, supervision, and reporting obligations [1] [2] [3]. Implementation controversies—costs, civil‑liberties impacts, and political pushback—are documented by advocacy and policy groups in the supplied reporting, but judicial evaluation of the statute and MOAs is not covered in these sources and therefore remains an unresolved thread in this dataset [4] [5] [6].

Want to dive deeper?
What federal court decisions have interpreted 8 U.S.C. § 1357(g) and ruled on the validity of 287(g) MOAs?
How do ICE 287(g) Memoranda of Agreement differ between the Jail Enforcement Model and other ICE‑local partnership models?
What evidence exists about the fiscal costs and public‑safety impacts of 287(g) programs in jurisdictions that adopted them?