Opinion
Welfare and Institutions Code section 602 purports to give our state courts jurisdiction to declare any juvenile who “violates any law ... of the United States” a ward of the court. (Id., subd. (a).) However, Congress has granted federal courts “original jurisdiction, exclusive of the courts of the States, of all offenses against the laws of the United States.” (18 U.S.C. § 3231.) We consider whether, under the United States Constitution’s supremacy clause, section 3231 or any other provision of federal law preempts Welfare and Institutions Code section 602.
We conclude Welfare and Institutions Code section 602 is not preempted. While Congress has barred state courts from entertaining direct criminal prosecutions of federal violations, close analysis of the federal statutes allocating jurisdiction demonstrates Congress did not intend to preclude state сourts from adjudicating whether federal law has been violated *540 in the context of state delinquency proceedings. Such proceedings exist, separate and apart from the adult criminal justice system, out of a recognition that minors who commit criminal offenses pose a special problem and require treatment and rehabilitation different from the confinement and punishment meted out in adult criminal trials. Whether delinquency proceedings are treated as civil or criminal, the determinations they entail—whether a minor should be declared a ward of the court and what juvenile treatment and rehabilitation he or she should be afforded—do not trench on exclusive federal court prerogatives to try, convict, and punish for the violation of federal law. To the contrary, Congress, recognizing no comparable federal system exists, has made clear its preference that offenses by minors be handled, whenever possible, by state juvenile courts. As an independent sovereign, California generally may exercise its police power to regulate such juvenile misconduct, even when that misconduct is simultaneously the subject of federal prohibitions.
Nor is the present proceeding, which involves the alleged violation of federal immigration law, preempted by exclusive federal authority over matters pertaining to immigration. While it is well settled that only the federal government may regulate the border and establish rules governing who may enter and who may stay, equally clear is that Congress has in its immigration enactments embraced a model of collaborative federalism under which states and localitiеs may assist in the enforcement of federal immigration policy. Welfare and Institutions Code section 602, insofar as it authorizes state courts to address juvenile violations of the immigration laws, does just that.
We will affirm the Court of Appeal.
Factual and Procedural Background
On August 16, 2006, United States Border Patrol agents tracked footprints leading across the Mexican border into the California desert near Calexico. A border patrol agent in a helicopter saw several persons hiding in bushes. One of these persons, later identified as Jose C., motioned to the other individuals to follow him. When agents approached the group on foot, he broke off and hid an item under a bush. After detaining Jose C. and six other persons, an agent recovered a cell phone hidden under the bush. The federal agents arrested Jose C., a minor, and transferred him to state custody.
The Imperial County District Attorney thereafter filed a juvenile wardship petition under Welfare and Institutions Code section 602, alleging a single count of illegally bringing six aliens into the United States without presentation at the border, in violation of title 8 United States Code section *541 1324(a)(2)(B)(iii). At the outset of the jurisdictional hearing, Jose C.’s counsel objected that the juvenile court lacked jurisdiction to adjudicate federal criminal violations. The juvenile court overruled the objection, relying on the portion of Welfare and Institutions Code section 602 that purports to give state courts authority to base wardships on violations of federal law.
At trial, two of the persons who had been detained with Jose C. testified they had made arrangements with undisclosed parties for assistance in crossing into the United States and had agreed to pay $1,800 once safely inside the country. Thеy further testified that Jose C. had acted as their guide during the crossing. Jose C. told them when to move, swept their footprints to remove their tracks, and repeatedly spoke on a cell phone, apparently in an attempt to determine when immigration agents were in the vicinity. Based on this evidence, the court found the allegations in the petition true beyond a reasonable doubt and declared Jose C. a ward of the court. At the dispositional hearing, the court declared the offense a felony, set the maximum term of confinement at 10 years, gave Jose C. credit for 58 days served in juvenile hall, and placed him on formal probation.
The Court of Appeal affirmed. It rejected Jose C.’s argument that the juvenile court lacked jurisdiction, reasoning that whether or not title 18 United States Code section 3231 deрrived state courts of jurisdiction was irrelevant because title 18 United States Code section 5032 (a statute governing delinquency proceedings in federal court) displaced section 3231 with regard to juvenile matters, a presumption of concurrent jurisdiction applied, and section 5032 made no mention of depriving state courts of jurisdiction.
We granted review to resolve a significant federalism question: whether under Welfare and Institutions Code section 602 a state court has jurisdiction to declare a juvenile a ward of the court based on violations of federal law.
Discussion
I. Jurisdictional Preemption
A. Title 18 United States Code Section 3231
Welfare and Institutions Code section 602, subdivision (a) provides in relevant part: “[A]ny person who is under the age of 18 years when he or she violates any law of this state or of the United States or any ordinance of any city or county of this state defining crime ... is within the jurisdiction of the juvenile court, which may adjudge such person to be a ward of the court.” (Italics added.) Thus, as a matter of state law, the Legislature has granted *542 juvenile courts the authority to declare juveniles wards of the court on the basis of acts that violate state or federal criminal law.
Jose C. contends this jurisdictional grant is necessary but not sufficient; that under the supremacy clause (U.S. Const., art. VI, cl. 2), state court jurisdiction depends as well on whether Congress has withdrawn from state courts the power to exercise jurisdiction. As a constitutional matter, it has long been settled that Congress has the power to constrict state court jurisdiction, at least with respect to federal matters.
(Howlett v. Rose
(1990)
The first sentence of section 3231 provides: “The district courts of the United States shall have original jurisdiction, exclusive of the courts of the States, of all offenses against the laws of the United States.” This portion of the statute establishes two general principles: first, federal district courts may exercise jurisdiction over federal criminal offenses, and second, state courts may not do so. At a minimum, therefore, section 3231 displaces state court jurisdiction over the direct prosecution, conviction, and imposition of federal criminal punishment for violations of federal criminal statutes. Jose C. contends section 3231 goes further and precludes state courts from interpreting and adjudicating in any proceeding whether a federal criminal statute has been violated.
In contesting whether the language оf the statute bars adjudication of federal criminal conduct in the context of a state wardship petition, the People and Jose C. debate at length whether a state wardship petition gives rise to a “civil” or “criminal” proceeding. Wardship proceedings have at different times, and for different purposes, been characterized as de facto criminal (e.g.,
In re Gault
(1967)
B. Welfare and Institutions Code Section 602 as a Civil Proceeding
Taking first the view that wardship proceedings are properly characterized as civil, we follow the United States Supreme Court’s lead in
Tafflin v. Levitt
(1990)
The United States Supreme Court found no incompatibility. “[Concurrent jurisdiction over [18 U.S.C.] § 1964(c) suits,” it explained, “is clearly not incompatible with § 3231 itself, for civil RICO claims are not ‘offenses against the laws of the United States,’ § 3231, and do not result in the imposition of criminal sanctions—uniform or otherwise.”
(Tafflin v. Levitt, supra,
In short, though a civil proceeding such as civil RICO may require adjudication of whether a federal criminal law has been violated, that determination does not of itself convert the civil proceeding into an “offense[]” subject to the exclusive jurisdictional bar of section 3231. Rather,
Tafflin
makes clear, a proceeding involves adjudication of an offense only if,
*544
at a minimum, it also involves “the imposition of criminal sanctions.”
(Tafflin v. Levitt,
supra,
C. Welfare and Institutions Code Section 602 as a Criminal Proceeding
We now consider the contrary characterization, that for purposes of preemption under title 18 United States Code section 3231, a state wardship proceeding under Welfare and Institutions Code section 602 is properly viewed as fundamentally criminal. This characterization changes our reasoning, but not our conclusion that section 3231 does not preempt state wardship proceedings.
First, it has always been understood that the several states are independent sovereigns possessing inherent police power to criminally punish conduct inimical to the public welfare, even when that same conduct is also prohibited under federal law.
2
“The Constitution leaves in the possession of
*545
each State ‘certain exclusive and very important portions of sovereign power.’ ”
(Heath v. Alabama
(1985)
Section 3231 embraces these settled principles. It provides in its second sentence: “Nothing in this title shall be held to take away or impair the jurisdiction of the courts of the several States
under the laws thereof.”
(Italics added.) Thus, while the section grants federal courts exclusive jurisdiction over the
prosecution
of federal offenses, it does not do so over the
punishment
of acts criminalized by federal law; to the extent state law also establishes sanctions for those acts, state courts retain jurisdiction under their own state laws to hear cases and impose punishment. (See
In re Dixon
(1953)
*546
Second, whether a state legislature exercises its sovereign power to impose independent state criminal punishment for an act by writing its own statute prohibiting it, or by writing a statute incorporating an existing federal criminal prohibition, is immaterial. The distinction is a purely formal one. A state or territory that elects to incorporate portions of federal criminal law into its own criminal code may establish state jurisdiction to try violations as state crimes without offending section 3231.
(U.S. v. Lee
(9th Cir. 2006)
This is, in essence, what Welfare and Institutions Code section 602 does. It incorporates by reference federal criminal law, rendering it a basis for the imposition of independent state sanctions, and grants state courts authority to adjudicate such matters. It recognizes the independent state interest in rehabilitating juveniles within this state who are unable to conform their conduct to the requirements of the law—whether that law be local ordinance, state statute, or federal enactment. 7 Section 3231 does not deprive state courts of jurisdiction granted under their own state laws to impose independent state sanctions.
Jose C. objects that under this interpretation of section 3231, states may augment federаl criminal statutes in any way they please, adding on various civil or criminal piggyback remedies or sanctions that might conflict with federal dictates. But whether Congress has preempted state court
jurisdiction
is not to be confused with whether it has preempted state
legislative action.
The former involves only the question whether a state court has the power to entertain a particular cause; the latter involves the further question whether a state may enact substantive legislation governing the subject matter of the particular cause. (See
Houston v. Moore, supra,
18 U.S. at pp. 24-25 [drawing the identical distinction in the course of concluding that state regulation, but not state jurisdiction, was preempted].) Section 3231, as interpreted in
Tafflin
v.
Levitt, supra,
Jose C. also relies on two sister-state decisions that have addressed this issue and concluded section 3231 does in fact preempt state court jurisdiction. In
State
v.
Tidwell
(1982)
State v. Tidwell, supra,
In sum, whether characterized as civil or criminal, wardship proceedings that entail adjudication of whether a federal criminal statute has been violated are not expressly preempted by section 3231. 8
*548 II. Immigration Preemption
We consider Jose C.’s alternative argument, that Congress has exclusive power to regulate immigration and state court adjudication of incorporated federal immigration offenses is preempted as an infringement of that power.
In the exercise of its powers, Congress may preempt state courts from exercising jurisdiction over immigration matters, or it may preemрt state legislatures from substantively regulating on matters touching upon immigration. We address each possibility in turn.
A. Jurisdictional Preemption: Title 8 United States Code Section 1329
Federal criminal laws relating to immigration are collected in title 8, chapter 12, subchapter II of the United States Code. Congress has granted federal courts jurisdiction over such matters: “The district courts of the United States shall have jurisdiction of all causes, civil and criminal, brought by the United States that arise under the provisions of this subchapter.” (8 U.S.C. § 1329.) We think it clear Congress has not thereby preempted state court jurisdiction.
Title 8 United States Code section 1329 vests federal courts with jurisdiction but makes no mention of state courts. The absence of an express exclusion of state court jurisdiction “is strong, and arguably sufficient, evidence that Congress had no such intent.”
(Yellow Freight System, Inc.
v.
Donnelly
(1990)
*549
Jose C. relies on
Gutierrez v. City of Wenatchee
(E.D.Wash. 1987)
In Gutierrez, an alleged illegal alien facing state incarceration following a probation revocation hearing sought an injunction in federal court. The terms of his probation forbade violation of any laws; at the probation revocation hearing, the state court purported to determine Gutierrez had violated federal immigration law. The federal district court issued a declaratory judgment, holding Gutierrez’s immigration status could be decided only in the context of a federal prosecution or fedеral administrative proceeding. (Gutierrez v. City of Wenatchee, supra, 662 F.Supp. at pp. 822, 825.)
Gutierrez
rests, first, on the understanding that immigration may be regulated only by the federal government—a proposition we agree with in part, as discussed below, but which is not determinative—and second, on the understanding that under section 3231, state court adjudications of whether federal criminal laws have been violated impinge on federal sovereignty, even when the adjudication arises in the course of an independent state law proceeding (there, a probation revocation hearing). (See
Gutierrez v. City of Wenatchee, supra,
B. Substantive Preemption: Title 8 United States Code Section 1324
1. Preemption principles
Finally, we consider whether, though state court jurisdiction exists, Congress has preempted states from substantively regulating immigration matters, and in particular alien smuggling. That is, though Welfare and Institutions Code section 602 is valid insofar as it vests state juvenile courts with jurisdiction to decide whether federal immigration law has been violated, whether a state may condition wardship status, or any other state *550 remedy or sanction, on the violation of a federal criminal immigration law is a separate question. The power to regulate is not necessarily coextensive with the power to adjudicate.
The “[p]ower to regulate immigration is unquestionably exclusively a federal power.”
(De Canas v. Bica
(1976)
While the immigration power is exclusive, it does not follow that any and all state regulations touching on aliens are preempted.
(De Canas
v.
Bica, supra,
We have identified four ways in which Congress may preempt state law: express, conflict, obstacle, and field preemption.
(Farm Raised Salmon Cases
(2008)
Rather, the issue is one of field and obstacle preemption. “[Fjield preemption, i.e., ‘Congress’ intent to pre-empt all state law in a particular area,’ applies ‘where the scheme of federal regulation is sufficiently comprehensive to make reasonable the inference that Congress “left no room” for supplementary state regulation.’ ”
(Viva! Internat. Voice for Animals v. Adidas Promotional Retail Operations, Inc., supra,
2. Field preemption
We discern no intent by Congress, in either its initial enactment or subsequent amendments of the Immigration and Nationality Act (INA) (8 U.S.C. §§ 1101-1537), to occupy the field of immigration law generally or alien smuggling in particular.
As a general matter, the United States Supreme Court has declined to “presume that Congress, in enacting the INA, intended to oust state authority to regulate ... in a manner consistent with pertinent federal laws.”
(De Canas
v.
Bica, supra,
We reach the same conclusion in the context of alien smuggling and enforcement of immigration-related criminal law. A series of provisions in the INA demonstrate Congress, far from occupying the field, welcomed state and local assistance in enforcement.
Of greatest significance, title 8 United States Code section 1324(c) expressly allows for state and local enforcement of sеction 1324’s alien smuggling provisions. Arrests for violations of section 1324 may be made by various designated immigration officers and by “all other officers whose duty it is to enforce criminal laws.” (8 U.S.C. § 1324(c).) As the Court of Appeal in
People v. Barajas
(1978)
Three more recent amendments of the INA are to similar effect. Title 8 United States Code section 1357(g), adopted as part of the Illegal Immigration Reform and Immigrant Responsibility Act of 1996 (Pub.L. No. 104-208 (Sept. 30, 1996) 110 Stat. 3009-546), authorizes states and localities to enter into written аgreements with the United States Attorney General under which state and local officials will have authority to investigate, apprehend, and detain individuals for suspected violations of immigration law, and further emphasizes that even in the absence of a written agreement, state and local officials are free to cooperate with the United States Attorney General in the enforcement of immigration laws. (8 U.S.C. § 1357(g)(10).) Title 8 United States Code section 1103(c), amended at the same time, similarly authorizes the Commissioner of the Immigration and Naturalization Service to “enter into cooperative agreements with State and local law enforcement agencies for the purpose of assisting in the enforcement of the immigration laws.” Finally, title 8 United States Code section 1252c, adopted as part of the Antiterrоrism and Effective Death Penalty Act
*553
of 1996 (Pub.L. No. 104-132 (Apr. 24, 1996) 110 Stat. 1276), expressly authorizes state and local officials in specified circumstances to make arrests of individuals illegally present in the United States. “Both the plain language and legislative history of § 1252c reflect that Congress intended the provision to displace perceived Federal limitations on the authority of state and local officers to arrest ‘criminal illegal aliens.’ ”
(U.S.
v.
Vasquez-Alvarez
(10th Cir. 1999)
Consistent with these provisions, those federal circuits to have addressed the question (the Fifth, Ninth, and Tenth) have unanimously concluded Congress has not occupied the field and preempted state assistance in the enforcement of federal criminal immigration law. The federal criminal regulation of immigration is not so complex or comprehensive that it may be inferred Congress intended to occupy the field.
(Gonzales v. City of Peoria,
supra, 722 F.2d at pp. 474-475.) Instead, “federal law ‘evinces a clear invitation from Congress for state and local agencies to participate in the process of enforcing federal immigration laws.’ ”
(U.S. v. Santana-Garcia
(10th Cir. 2001)
In making his field preemption argument, Jose C. relies entirely on cases drawn from the area of industrial relations, an area in which “[i]t is by now a сommonplace [understanding] that in passing the [National Labor Relations Act] Congress largely displaced state regulation . . . .”
(Wisconsin Dept, of Industry v. Gould Inc.
(1986)
3. Obstacle preemption
“There remains the question whether, although the INA contemplates some room for state legislation, [Welfare and Institutions Code section 602] is nevertheless unconstitutional because it ‘stands as an obstacle to the accomplishment and execution of the full purposes and objectives of Congress’ in enacting the INA.”
(De Canas v. Bica, supra,
That Welfare and Institutions Code section 602 mirrors federal objectives we infer from two separate grounds. First, it incorporates criminal immigration law and thereby adopts the same standards; that which is a violation of federal criminal immigration law is a violation under Welfare and Institutions Code section 602, while that which is not, is not. Where state law “mandates compliance with the federal immigration laws and regulations, it cannot be said [state law] stands as an obstacle to accomplishment and execution of congressional objectives embodied in the INA.”
(In re Manuel R, supra,
Second, as we shall explain, Congress’s passage of the Juvenile Justice and Delinquency Prevention Act of 1974 (Delinquency Prevention Act) (18 U.S.C. §§ 5031-5042), and in particular title 18 United States Code section 5032, demonstrates that Welfare and Institutions Code section 602 is wholly consistent with federal objectives. The text and history behind the Delinquency Prevention Act show that state juvenile dispositions for offenders who may have violated a federal criminal statute are no obstacle to federal goals; to the contrary, Congress strongly prefers such outcomes.
Title 18 United States Code section 5032, with limited exceptions not applicable here, establishes a presumption that juveniles who are alleged to have violated federal criminal law shall be proceeded against in state juvenile court. An alleged juvenile delinquent “shall not be proceeded against in any court of the United States unless the Attorney General” certifies that one of three conditions has been met: (1) the state court “does not have jurisdiction or refuses to assume jurisdiction over said juvenile with respect to such alleged act of juvenile delinquency,” (2) no adequate state juvenile program exists, or (3) the crime is one of a specified list of drug- and violence-related offenses. (18 U.S.C. § 5032.) The text thus establishes a strong preference for juvenile offenders to be channeled into and handled by state juvenile courts whenever jurisdiction exists for the state courts to accept them.
The legislative history of the Delinquency Prevention Act is to the same effect. Congress recognized juvenile delinquency as “essentially a State and local problem which must be dealt with by the State and local governments.” (Sen.Rep. No. 93-1011, 2d Sess. (1974), reprinted in 1974 U.S. Code Cong. & Admin. News, pp. 5283, 5286.) However, because “[f|ederal
*555
assistance is very necessary to provide needed financial assistance and resources”
(ibid.),
Congress passed the Delinquency Prevention Act to “provide[] for Federal leadership and coordination of the resources necessary to develop and implement at the State and local community level effective programs for the prevention and treatment of juvenile delinquency” (1974 U.S. Code Cong. & Admin. News, p. 5283). The measure was intended to afford “[assistance in the development of State and local mechanisms designed to channel juveniles, for whom the criminal justice system is inappropriate, away from and out of the system into human problem-solving agencies and professions.”
(Id.
at p. 5287.) “Congress ‘recognized that the federal court system is at best ill equipped to meet the needs of juvenile offenders. Deference to the state courts should always be observed except in the most severe of cases.’ ”
(U.S. v. Chambers
(6th Cir. 1991)
Clearly, then, Welfare and Institutions Code section 602’s incorporation of federal criminal law so that juvenile delinquents who violate federal law may be handled through state wardship proceedings is no obstacle to federal goals; instead, it ensures precisely the approach Congress expressly prefers.
It is equally evident Welfare and Institutions Code section 602 furthers legitimate state interests. The purposes of juvenile wardship proceedings are twofold: to treat and rehabilitate the delinquent minor, and to protect the public from criminal conduct.
(In re Jerald C.
(1984)
*556 Disposition
For the foregoing reasons, we affirm the Court of Appeal’s judgment.
George, C. J., Kennard, J., Baxter, J., Chin, J., Moreno, J., and Corrigan, J., concurred.
Notes
Similarly, in the context of probation revocation hearings triggered by further criminal conduct, our Courts of Appeal have correctly recognized that a state court may adjudicate the predicate question whether a violation of federal law has been committed.
(People
v.
Beaudrie
(1983)
See
Westfall v. United States
(1927)
There are limits to this principle; Congress may, if it so chooses, preempt state criminal regulation of particular acts. (See
Pennsylvania v. Nelson
(1956)
See also
Department of Revenue of Mont.
v.
Kurth Ranch
(1994)
This is what we meant when we explained long ago that “[s]tate tribunals have no power to punish crimes against the laws of the United States,
as such.
The same act may, in some instances, be an offense against the laws of both, and it is only as an offense against the State laws that it can be punished by the State, in any event.”
(People
v.
Kelly
(1869)
At oral argument, Jose C. contended this second sentence relates only to preservation of state jurisdiction in civil matters. Nothing in the structure of the sentence suggests such a limitation. To the contrary, its placement in title 18 of the United States Code, governing
*546
criminal matters, belies such an interpretation, and in
In re Dixon, supra,
Arguing against the power of states to regulate that which the federal government has proscribed criminally, Jose C. cites
People v. Zacarias
(2007)
See, e.g.,
In re Charles C., supra,
Because we so conclude, we need not reach the ground on which the Court of Appeal based its rejection of Jose C.’s section 3231 argument: that title 18 United States Code section 5032 supersedes section 3231 with respect to juvenile delinquency proceedings. As explained below, however, our interpretation of the effect of section 3231 on state juvenile proceedings has the salutary consequence of ensuring that state courts will remain open as forums in which to address juvenile conduct that runs afoul of federal criminal laws, an outcome Congress quite *548 clearly and expressly desired when it passed the Juvenile Justice and Delinquency Prevention Act of 1974 (18 U.S.C. §§ 5031-5042). (See post, pp. 554-555.)
We note as well that our own Courts of Appeal have correctly concluded, albeit contrary to
Gutierrez
v.
City of Wenatchee, supra,
While there are some specific express preemption provisions, they do not touch upon any areas at issue here. (See, e.g., 8 U.S.C. § 1324a(h)(2) [preempting most state sanctions against those who employ unauthorized aliens].)
