J. JOSEPH SMITH, Circuit Judge:
On March 29, 1966, appellant Liguori and three co-defendants were indicted on six counts arising out of their acquisition, possession and concealment of 23.-361 kilograms of marihuana. Count numbers three and five charged appellant with knowingly and unlawfully acquiring marihuana without paying the required transfer tax, in violation of 26 U.S.C. § 4744(a). The other counts charged conspiracy and violations of 21 U.S.C. § 176a (concealing and dealing in marihuana known to have been smuggled into the United States). He pleaded not guilty to all counts on April 14, 1966.
More than two years later, on the eve of trial, August 19, 1968, Liguori changed his plea to guilty on count number three. On October 29, 1968, Judge Manuel Real, United States District Judge for the Central District of California, sitting in the District Court for the Eastern District of New York, sentenced Liguori to five years imprisonment, to run consecutively with an unrelated sentence he was then serving. On the same day, on motion by the Assistant United States Attorney, Judge Real dismissed the charges against Liguori in counts one, two, four, five and six.
On Liguori’s motion, Judge Real, February 27, 1969, reduced the sentence to three years imprisonment to run consecutively with the unrelated sentence. No appeal was taken.
On May 19, 1969 the Supreme Court decided Leary v. United States, 395 U.S. 6, 89 S.Ct. 1532, 23 L.Ed.2d 57 (1969), which held that a timely assertion of the privilege against self-incrimination is a complete defense to prosecution under 26 U.S.C. § 4744(a) for obtaining marihuana without having paid the transfer tax required by 26 U.S.C. § 4741(a).
Thereafter on September 2, 1969, Li-guori filed a motion to the sentencing court pursuant to 28 U.S.C. § 2255 to vacate his conviction and sentence on the ground that his fifth amendment privilege against self-incrimination under the Leary decision precluded his punishment under 26 U.S.C. § 4744(a). On October 16, 1969, Judge Real denied the motion without a hearing, holding that Liguori’s guilty plea, entered with the assistance of counsel and with awareness of the nature of the offense and consequences of the plea, waived any claim he might have to applicability of the Leary deci[844]*844sion to his conviction. From this decision, Liguori appeals.1
Since we find that Leary should be given retroactive application (as to that portion dealing with the privilege against self-incrimination), that Liguori’s assertion of the privilege on collateral attack was timely, and that his guilty plea did not waive his privilege against self-incrimination, we reverse the order of the district court.
The Supreme Court in Leary, following its analogous treatment of the gambling taxes in Marchetti v. United States, 390 U.S. 39, 88 S.Ct. 697, 19 L.Ed.2d 889 (1968) and Grosso v. United States, 390 U.S. 62, 88 S.Ct. 709, 19 L.Ed.2d 906 (1968) and the registration requirement under the National Firearms Act in Haynes v. United States, 390 U.S. 85, 88 S.Ct. 722, 19 L.Ed.2d 923 (1968), refused to hold that 26 U.S.C. § 4744 requiring a transferee of marihuana to pay a tax is unconstitutional. Instead it ruled that a timely assertion of the privilege against self-incrimination is an absolute defense to prosecution under that section. Thus the statute continues to be viable and prosecutions under it could be successful if, for instance, a corporation acquired marihuana without paying the transfer tax, since a corporation is not entitled to assert the privilege against self-incrimination.2 See George Campbell Painting Corp. v. Reid, 392 U.S. 286, 288-289, 88 S.Ct. 1978, 20 L.Ed.2d 1094 (1968). Except for such unique situations “we believe [845]*845the effect of the Supreme Court decision [in Leary] is to prevent enforcement of the [provisions of the Marihuana Tax Act, 26 U.S.C. § 4744(a)] as they are now designed because of the ‘substantiality of the risks of incrimination.’ ” United States v. Manfredonia, 391 F.2d 229, 230 (2d Cir. 1968) (discussing the effect of Marchetti and Grosso).
In the present case we must decide whether Leary should be given retroactive effect to defendants whose convictions have become final before the Supreme Court rendered that decision, May 19, 1969, and whether appellant here has waived his defense based on the privilege by pleading guilty, or has raised his defense in an untimely fashion.
I. RETROACTIVITY
This court has not yet considered whether to give retroactive effect to Leary, as applied to convictions which were final before that decision, or to the analogous decisions in Marchetti, Grosso and Haynes, supra. See Desi-mone v. United States, 423 F.2d 576, 577 (2d Cir. 1970) (specifically avoiding the question of the retroactivity of Haynes; Judge Bonsai, dissenting, said he would apply Haynes retroactively). Only four other circuits have addressed the problem of the retroactivity of Leary. Ram-seur v. United States, 425 F.2d 413 (6 Cir. 1970) (holding Leary is mostly prospective) ; Santos v. United States, 417 F.2d 340 (7 Cir. 1969) (holding Leary is retroactive), vacated on other grounds, 397 U.S. 46, 90 S.Ct. 811, 25 L.Ed.2d 36 (1970); United States v. Scardino, 414 F.2d 925 (5 Cir. 1969) (assuming that Leary is not retroactive, nevertheless held that Leary applied to Scardino since his sentence had not been finally ordered) ; Rowell v. United States, 415 F.2d 300 (8 Cir. 1969) (holding Leary is retroactive), remanded on other grounds, 397 U.S. 662, 90 S.Ct. 1407, 25 L.Ed.2d 642 (April 27, 1970). See Miller v. United States, 311 F.Supp. 705, 709-711 (N. D.Ohio 1970) (holding Leary is retroactive) ; United States v. King, 307 F. Supp. 217 (S.D.Cal.l969) (dictum that Leary is retroactive); contra, Barrett v. United States, 300 F.Supp. 1060, 1062 (D.Minn.1969) (Leary is not retroactive).
On the analogous question of the retroactivity of Marchetti, Grosso and Haynes, the other circuits are divided, all but one holding in favor of retroactivity. Meadows v. United States, 420 F.2d 795 (9 Cir. 1969) (Haynes retroactive), petition for certiorari filed, 38 U.S.L.W. 3391 (February 20, 1970); United States v. Lucia, 416 F.2d 920 (5 Cir. 1969) (Marchetti retroactive); United States v. Miller, 406 F.2d 1100 (4 Cir. 1969) (Haynes retroactive); Graham v. United States, 407 F.2d 1313 (6 Cir. 1969) (Marchetti not retroactive). See Horton v. United States, 300 F.Supp. 1332 (D.Conn.1969); Stoney v. United States, 302 F.Supp. 145 (E.D.Mo.1968); Desimone v. United States, 303 F.Supp. 406 (D.Conn.1968) (alternate holding), affirmed on other grounds, 423 F.2d 576 (2d Cir. 1970), all holding that Haynes is not retroactive. Cf. Forgett v. United States, 390 U.S. 203, 88 S.Ct. 898, 19 L.Ed.2d 1033 (1968); Deckard v. United States, 381 F.2d 77 (8 Cir. 1967) (Blackmun, C.J.).
The Supreme Court has established three criteria for deciding which new constitutional rules should be given only prospective effect: “(a) the purpose to be served by the new standards, (b) the extent of the reliance by law enforcement authorities on the old standards, and (c) the effect on the administration of justice of a retroactive application of the new standards.” Stovall v. Denno, 388 U.S. 293, 297, 87 S.Ct. 1967, 1970, 18 L.Ed.2d 1199 (1967). The most important of the criteria is the purpose of the new constitutional rule, Desist v. United States, 394 U.S. 244, 249, 89 S.Ct. 1030, 22 L.Ed.2d 248 (1969). In addition, if the new rule affects “the very integrity of the fact-finding process” then it should be given retroactive effect. See Linkletter v. Walker, 381 U.S. 618, 638-639, 85 S.Ct. 1731, 1742, 14 L.Ed. 2d 601 (1965).
[846]*846Under this test, we conclude that the portion of Leary holding that the privilege against self-incrimination is a complete defense to a prosecution under section 4744(a) should be given retroactive effect. The purpose of the rule announced in Leary is to safeguard the fifth amendment privilege against self-incrimination. In the context of the Marihuana Tax Act which requires payment of the transfer tax upon acquisition of marihuana, the privilege is “the right not to be criminally liable for one’s previous failure to obey a statute which required an incriminatory act.” Leary v. United States, 395 U.S. 6, 28, 89 S.Ct. 1532, 1543, 23 L.Ed.2d 57 (1969). This purpose of the rule, therefore, cannot be furthered by the continued punishment of persons who were convicted prior to the Leary decision for failing to comply with the statute which required an incriminatory act. See United States v. Lucia, 416 F.2d 920, 925 (5 Cir. 1969).
Indeed, the purpose of protecting the privilege against self-incrimination, by prohibiting punishment for refusing to incriminate oneself, is served by retroactive application of Leary to terminate present punishment for a past refusal. We are not faced here with a rule whose purpose is to deter future conduct by law enforcement officials, which purpose is not furthered by retroactive application. Desist v. United States, 394 U.S. 244, 89 S.Ct. 1030, 22 L.Ed.2d 248 (1969); Fuller v. Alaska, 393 U.S. 80, 89 S.Ct. 61, 21 L.Ed.2d 212 (1968); Linkletter v. Walker, 381 U.S. 618, 85 S.Ct. 1731, 14 L.Ed.2d 601 (1965); see Halliday v. United States, 394 U.S. 831, 89 S.Ct. 1498, 23 L.Ed.2d 16 (1969).
Nor is any justified reliance by law enforcement officials or prosecutors upset by retroactive application of Leary. This is not an instance where the conduct of pre-trial proceedings and investigations or prosecutorial trial tactics would have been different had the Leary rule been in effect at the time. See, e.g., Stovall v. Denno, 388 U.S. 293, 87 S.Ct. 1967, 18 L.Ed.2d 1199 (1967); Johnson v. New Jersey, 384 U.S. 719, 86 S.Ct. 1772, 16 L.Ed.2d 882 (1966); Tehan v. United States ex rel. Shott, 382 U.S. 406, 86 S.Ct. 459, 15 L.Ed.2d 453 (1966). Had the Leary rule been in effect, there could have been no prosecution of Liguori for the crime with which he was charged. Thus the government could not have obtained the conviction of Liguori by modifying its pre-trial activities, the evidence it presented at trial, or its summation, or by requesting a different charge to the jury. Thus, although the government did rely on its ability to obtain a valid conviction under section 4744(a), it did not rely to its detriment. Even if the Leary rule had been known at the time, the government would have been in no better position to convict Liguori than it is now; a timely assertion of the privilege would have prevented any prosecution.
Similarly, the retroactive application of Leary will not have the adverse effect on the administration of justice which was avoided in such eases as Johnson v. New Jersey and Linkletter v. Walker, supra. Since retroactive application of Leary will completely bar any further prosecution, the government will not be burdened with the dilemma of either retrying large numbers of guilty persons with aged or dissipated evidence or permitting the release of such persons when there is a governmental interest in their continued punishment. Meadows v. United States, 420 F.2d 795, 799 (9 Cir. 1969), petition for certiorari filed, 38 U.S.L.W. 3391 (February 20, 1970); see Miller v. United States, 311 F.Supp. 705, 710 (N.D.Ohio 1970). The rule announced in Leary vitiates any governmental interest in the continued punishment of persons in violation of their fifth amendment privilege against self-incrimination. See United States v. Lucia, 416 F.2d 920, 926 (5 Cir. 1969); United States v. Miller, 406 F.2d 1100, 1104 (4 Cir. 1969).
To be sure, the rule announced in Leary does not go to “the very integrity of the fact-finding process,” Linkletter v. Walker, supra, 381 U.S. at 638-639, 85 S.Ct. at 1742, but it affects a decision [847]*847more fundamental than the fact-finding process — whether the government may punish a man under this statute, even if the facts reliably establish a violation. See United States v. Lucia, 416 F.2d 920, 926 (5 Cir. 1969).
We are not, therefore, convinced by the reasoning in Graham v. United States, 407 F.2d 1313 (6 Cir. 1969). We decline to follow Ramseur v. United States, 425 F.2d 413 (6 Cir. 1970), and we hold that the portion of Leary dealing with the privilege against self-incrimination should be given retroactive effect. Compare, United States v. Jenkins, 427 F.2d 149 (2d Cir. 1970) (presumed that invalidity of presumption of importation is retroactive); United States v. Scott, 425 F.2d 55 (9 Cir. 1970) (en banc) (portion of Leary dealing with the presumption of importation is retroactive) ; accord, Rivas v. United States, 315 F.Supp. 972 (S.D.N.Y. March 19, 1970), appeal docketed, Docket No. 34834 (2d Cir. May 25, 1970). Cf. United States v. Sorenson, 308 F.Supp. 1268 (E.D.N.Y. January 27, 1970).
II. TIMELINESS AND WAIVER
The Court in Leary, as in Marchetti, Grosso and Haynes, held that in order for the privilege to be a complete defense to prosecution under section 4744 (a) it must be asserted in a timely fashion and it must not be waived. 395 U.S. at 27, 89 S.Ct. 1532; United States v. Covington, 395 U.S. 57, 59, 89 S.Ct. 1559, 23 L.Ed.2d 94 (1969). We consider first whether Liguori’s assertion of the privilege was timely.
At the time Liguori pleaded guilty, August 19, 1968, only two courts had considered whether Marchetti, Grosso and Haynes (decided on January 29, 1968) would permit prosecutions under section 4744(a) over an assertion of the privilege against self-incrimination. Leary v. United States, 392 F.2d 220 (5th Cir. 1968) (en banc) (privilege is no defense), cert. granted, June 10, 1968, 392 U.S. 903, 88 S.Ct. 2058, 20 L.Ed.2d 1362; United States v. Covington, 282 F.Supp. 886 (S.D. Ohio March 27, 1968) (privilege is a defense). Under these circumstances Liguori cannot be faulted for failing to anticipate the action of the Supreme Court. Otey v. United States, 135 U.S.App.D.C. 142, 417 F.2d 559, 561 (1969); Rowell v. United States, 415 F.2d 300 (8 Cir. 1969), remanded on other grounds, 397 U.S. 662, 90 S.Ct. 1407, 25 L.Ed.2d 642 (April 27, 1970); Santos v. United States, 417 F.2d 340, 345 (7 Cir. 1969), vacated on other grounds, 397 U.S. 46, 90 S.Ct. 811, 25 L.Ed.2d 36 (1970); see United States v. Lopez, 414 F.2d 272, 273 (2d Cir. 1969) (per curiam) ; Meadows v. United States, supra; United States v. Lucia, supra; United States v. Miller, supra; but see Sepulveda v. United States, 415 F.2d 321 (10 Cir. 1969); United States v. Carlisle, 303 F.Supp. 627 (W.D.Okl.1969); cf. Stoney v. United States, 302 F.Supp. 145 (E.D.Mo.1968).
In Grosso v. United States, 390 U.S. 62, 88 S.Ct. 709, 19 L.Ed.2d 906 (1968) petitioner failed to assert at trial or before the Supreme Court the privilege as a defense to charges based on his failure to pay the occupational tax. Since the case law at the time had rejected such a defense, the Supreme Court held that his conviction on these charges should be reversed despite his total failure to assert the privilege. In similar circumstances, we have held that a plea of the privilege for the first time on appeal is timely when the trial took place prior to the Supreme Court’s decision. United States v. Lopez, 414 F.2d 272, 273 (2d Cir. 1969) (per curiam); United States v. Manfredonia, 391 F.2d 229 (2d Cir. 1968) (per curiam); accord, United States v. Whitehead, 424 F.2d 446, 448 (6 Cir. 1970) (en banc); Otey v. United States, 135 U.S.App.D.C. 142, 417 F.2d 559, .561 (1969); Becton v. United States, 412 F.2d 1005, 1007 (8 Cir. 1969) (Blackmun, C. J.); Shoffeitt v. United States, 403 F.2d 991 (5 Cir. 1968); Drennon v. United States, 393 F.2d 342 (8 Cir. 1968). In Leary itself, petitioner first asserted the privilege after the completion of the trial on motion [848]*848for a new trial. And in Forgett v. United States, 390 U.S. 203, 88 S.Ct. 898, 19 L.Ed.2d 1033 (1968), the Supreme Court on petition for hearing, reversed its previous 1966 denial of a petition for certi-orari, granted certiorari, and vacated judgment and remanded on the authority of Haynes. The successful defense based on Haynes was thus first asserted after certiorari had been denied.
It would seem that the Supreme Court’s requirement that the privilege be timely asserted was primarily designed to insure that in future cases the accused will assert his defense of the privilege before time and resources are wasted on a trial. We cannot conclude that the purpose of the timeliness requirement would be served by holding that Liguori’s assertion of the privilege was untimely, when at the time of his conviction, the Leary defense had not been established by the Supreme Court. Ramseur v. United States, 425 F.2d 413, at 415 (6 Cir. April 8, 1970); Miller v. United States, 311 F.Supp. 705, 708-709 (N.D.Ohio 1970). Liguori’s motion for relief under section 2255 (on September 2, 1969) was filed within four months of the Supreme Court’s decision in Leary.
Finally we must consider whether Liguori waived his privilege against self-incrimination by pleading guilty. The court below so held. Other courts considering the question, under Leary, or Marchetti, Grosso, or Haynes, supra, for the most part have found that a guilty plea is not a waiver of the privilege in cases of this nature. Meadows v. United States, supra, 420 F.2d at 797; United States v. Lucia, supra, 416 F.2d at 923; United States v. Miller, supra, 406 F.2d at 1105; Desimone v. United States, 423 F.2d 576, at 583 (2d Cir. May 1, 1970) (dissenting opinion); Miller v. United States, 311 F.Supp. 705, 709 (N. D.Ohio 1970); see United States v. Scardino, 414 F.2d 925, 927 (5 Cir. 1969) (dictum); United States v. King, 307 F. Supp. 217, 218 (S.D.Cal.1969) (dictum); contra, Eby v. United States, 415 F.2d 319 (10 Cir. 1969) (per curiam).
By pleading guilty here, Liguori admitted that he had failed to comply with the transfer tax provisions of section 4744(a). He thereby waived his right to trial and his privilege to remain silent as to whether he failed so to comply. McMann v. Richardson, 397 U.S. 759, 90 S.Ct. 1441, 1446, 25 L.Ed.2d 763 (May 4, 1970). But he did not intentionally relinquish his known right not to be punished for failing to comply with a statute which required him to incriminate himself. Johnson v. Zerbst, 304 U.S. 458, 464, 58 S.Ct. 1019, 82 L.Ed. 1461 (1938). This is especially true since at the time he pleaded guilty, before the Leary decision, he could not have known that he possessed that right. See United States v. Whitehead, 424 F.2d 446, 448 (6 Cir. 1970) (en banc); Otey v. United States, 135 U.S.App.D.C. 142, 417 F.2d 559, 561 (1969) .
Nor is this situation controlled by the recent decisions of the Supreme Court in McMann v. Richardson, 397 U.S. 759, 90 S.Ct. 1441, 25 L.Ed.2d 763 (1970); Parker v. North Carolina, 397 U.S. 790, 90 S.Ct. 1458, 25 L.Ed.2d 785 (1970) ; Brady v. United States, 397 U.S. 742, 90 S.Ct. 1463, 25 L.Ed.2d 747 (1970). In those cases the Court held that a guilty plea is not involuntary if it is based on competent contemporary advice of counsel as to admissibility of a confession or as to the validity of a possible death sentence after conviction by a jury, even if subsequent Supreme Court decisions render the confession inadmissible or the possible death sentence invalid.
The Court in those cases relied heavily on the fact that when a petitioner pleaded guilty, he admitted in open court that he committed the charged crime. Moreover the Court felt that it would be too difficult to determine years later the magnitude of the effect of petitioner’s fear of his confession or the death sentence on the petitioner’s original decision to plead guilty. And the Court was apparently concerned with the burden on the states of having to permit reopening of countless guilty pleas to a variety of [849]*849charges which only became open to challenge due to subsequent changes in the law.
The instant case does not fall within those concerns. First of all, we are not considering here as in McMann v. Richardson, supra, et al., whether Liguori’s plea was voluntary. Liguori has not claimed that his plea was involuntary. Rather, we consider here whether Liguori when he pleaded guilty intended to waive his defense under Leary even before that decision was rendered. We think that he did not. See United States v. Lucia, 416 F.2d 920, 923 (5 Cir. 1969).
Second, although Liguori admitted in open court that he violated section 4744 (a), this does not, unlike in Richardson, et al., establish that there is a governmental interest in his punishment. In this case, it is the statutory scheme imposing punishment for failing to incriminate oneself which violates the privilege against self-incrimination, so that even if the procedures leading to the conviction were correct the punishment here, unlike in Richardson, et al., is unjustified.
Third, there is no difficulty now in determining whether Liguori would have pleaded guilty had the Leary rule been in effect at the time. Since Leary and the privilege would have provided a complete defense to prosecution, we are not faced with an accused’s decision to plead guilty based on difficult judgments as to the strength of the government’s case and as to the possibility of leniency. McMann v. Richardson, supra, 90 S.Ct. at 1448. In this case Liguori certainly would not have pleaded guilty had he known of his right to assert the privilege as a complete defense.3
Finally, by permitting Liguori’s defense founded on his privilege against self-incrimination, despite his plea of guilty, we do not jeopardize valid convictions on a wide variety of state and federal charges as was feared in Mc-Mann v. Richardson, supra, et al. Here we only permit the defense of privilege to be asserted by prisoners who pleaded guilty to a single federal offense, when the federal government has no valid interest in the continued punishment of those prisoners for that offense. See United States v. Miller, 406 F.2d 1100, 1104 (4 Cir. 1969).
III. DISPOSITION
Since we have found that Liguori has timely asserted his privilege against self-incrimination and that he did not waive his privilege by pleading guilty prior to the Leary decision, we reverse the decision of the court below and remand with directions to vacate the judgment of conviction.4 There is no ques[850]*850tion here that “possession of marihuana was illegal under [New York] law, and that [Liguori] would have run a substantial risk of incrimination had he complied with the Act. We conclude that there is no possibility of any factual dispute with regard to the hazard of incrimination.” United States v. Covington, 395 U.S. 57, 61, 89 S.Ct. 1559, 1561, 23 L.Ed.2d 94 (1969).
Reversed and remanded. Mandate may issue forthwith.