The opinion of the court was delivered by: Smith, J.:
This opinion is uncorrected and subject to revision before publication in the New York Reports.
We hold that, under New York's "strict equivalency" standard for convictions rendered in other jurisdictions, a federal conviction for conspiracy to commit a drug crime may not serve as a predicate felony for sentencing purposes.
Defendant was convicted, on his plea of guilty, of third degree robbery, a felony (Penal Law § 160.05). He was sentenced as a second felony offender, on the basis of a previous conviction in the United States District Court for the Southern District of New York of conspiracy to distribute heroin, and to possess it with intent to distribute (21 USC § 846, 21 USC § 841 [a] ). The Appellate Division affirmed his conviction and sentence, rejecting the argument that he was improperly adjudicated a predicate felon (People v Ramos, 80 AD3d 537 [1st Dept 2011]). A Judge of this Court granted leave to appeal (17 NY3d 821 ), and we now modify the Appellate Division's order.
Penal Law § 70.06 (1) (b) says: "For the purpose of determining whether a prior conviction is a predicate felony conviction the following criteria shall apply: "(i) The conviction must have been in this state of a felony, or in any other jurisdiction of an offense for which a sentence to a term of imprisonment in excess of one year or a sentence of death was authorized and is authorized in this state . . . ."
We have interpreted the words "is authorized in this state" to require that the crime of which the defendant was convicted in another jurisdiction include all the essential elements of a New York felony (People v Muniz, 74 NY2d 464, 467-468 ). As a general rule (with an exception not relevant here), inquiry "is limited to a comparison of the crimes' elements as they are respectively defined in the foreign and in New York penal statutes" (id.). It is immaterial that the crime actually committed in the foreign jurisdiction may be the equivalent of a felony in New York, if the foreign statute would have permitted a conviction for conduct that did not amount to a New York felony (see People v Olah, 300 NY 96, 98-99 ; People v Gonzalez, 61 NY2d 586 ; People v Muniz, 74 NY2d at 467-469). We have referred to our test as one of "strict equivalency," and have observed that "technical distinctions between the New York and foreign penal statutes can preclude use of a prior felony as a predicate for enhanced sentencing" (Matter of North v Board of Examiners of Sex Offenders of State of N.Y., 8 NY3d 745, 751 ).
Thus, to decide if defendant here was properly sentenced as a predicate felon, we must compare the federal drug conspiracy statute, 21 USC § 846, with our own statutes prohibiting conspiracy, Penal Law § 105.00 et seq. When we do so, we find a conspicuous difference: The commission of an overt act by one of the conspirators in furtherance of the conspiracy is required under New York, but not under federal, law. Penal Law § 105.20 says:
"A person shall not be convicted of conspiracy unless an overt act is alleged and proved to have been committed by one of the conspirators in furtherance of the conspiracy."
The same is not true under the federal statute, as the United States Supreme Court held in United States v Shabani (513 US 10, 11 ):
"This case asks us to consider whether 21 U.S.C. § 846, the drug conspiracy statute, requires the Government to prove that a conspirator committed an overt act in furtherance of the conspiracy. We conclude that it does not."
Because New York law requires proof of an element that federal law does not, defendant's federal conspiracy conviction cannot serve as a predicate.
Seeking an escape from this conclusion, the People argue that New York's "overt act" requirement is not an "element" of the crime of conspiracy, but merely an "evidentiary requirement" -- analogous, the People suggest, to the corroboration requirements imposed by certain other sections of the Penal Law (see Penal Law § 115.15, § 130.16, § 255.30). We find the argument unpersuasive. In several cases, beginning in the nineteenth century and continuing into the twenty-first, we have either explicitly labeled the overt act as an "element" of the crime of conspiracy, or have used words equivalent in meaning to "element" to describe it. Thus in People v Sheldon (139 NY 251, 265 ), we said:
"The object of the statute [requiring an overt act] was to require something more than a mere agreement to constitute a criminal conspiracy" (emphasis added).
In People v Hines (284 NY 93, 112 ), we said:
"[A]n overt act is an essential ingredient of the crime of conspiracy. ...