Wе decide today a question of first impression: Do principles of sovereign immunity bar a federal district court, exercising its supervisory power, from assessing attorneys’ fees and costs against the federal government in a criminal ease? We answer this question affirmatively and, therefore, annul the district court’s fee-shifting orders.
I. FACTUAL BACKGROUND
This appeal arises out of unpardonable misconduct committed by a federal prosecutor who should have known better. The factual background of the criminal case in which the misconduct occurred — a multi-de-fendant prosecution for,
inter alia,
conspiracy to defraud a federally insured financial institution — is memorialized in a recent opinion of this court.
See United States v. Lacroix,
In mid-1992, a federal grand jury returned a 102-count indictment against seven individuals allegedly involved in a conspiracy to market and sell newly constructed homes by fraudulent means. The indictment charged violations of 18 U.S.C. §§ 371,1014 and 1344. The prosecutors who controlled the ease were members of the Justice Department’s “New England Bank Fraud Task Force,” so called. The defendants, none of whom were indigent, obtained counsel at their own expense.
During pretrial proceedings, the government made more than 10,000 documents available for inspection at the Boston office of Aspen Systems, an independent document management firm retained by the Task Force. On November 9, 1992, an attorney representing defendants Matthew Zsofka, John Lee, and Evangelist Lacroix visited the document repository to search for papers that might prove helpful in cross-examination. A government paralegal volunteered to have a member of Aspen’s clerical staff photocopy any document thаt caught the lawyer’s eye. The attorney accepted the offer. When the paralegal mentioned this undertak *758 ing to the lead prosecutor, she was instructed to have the Aspen employee make an extra copy of each defense-selected document for the government’s edification. Defense counsel was not informed of this added flourish.
To paraphrase the Scottish poet, the best-laid schemes of mice and prosecutors often go awry. Cf. Robert Burns, To a Mouse (1785). When the photocopying of desired documents took longer than seemed reasonable, the defense attorney smelled a rat. A cursory investigation uncovered the prosecution’s experiment in duplicitous duplication. The lawyer promptly demanded that the government return its copies of the papers culled by the defense. When his demand fell on deaf ears, he immediately drafted a motion to seal, filed the motion with the district court, and served it beforе the close of business that day.
At this delicate juncture, the lead prosecutor poured kerosene on a raging fire. 1 She did not passively await the court’s ruling on the motion, but, instead, during the three days that elapsed before the district court took up the motion, the prosecutor reviewed the surreptitiously duplicated documents, discussed them with two of her subalterns, and used them to prepare a key prosecution witness (in the presence of a second possible witness). Thus, by November 13,1992, when the court granted the motion to seal and explicitly instructed the lead prosecutor not to make further use of the papers singled out by the defense or take further advantage of the situation, appreciable damage already had been done.
The lead prosecutor then made a bad situation worse. Two pages mysteriously disappeared from the lead prosecutor’s cache of ill-gotten documents before the set was submittеd to the district court for sealing. And in direct defiance of the court’s order, the lead prosecutor prepared a complete new set for her own use. Adding insult to injury, she next signed an affidavit of somewhat questionable veracity. Finally, when she appeared before the district court to discuss the bizarre game she had been playing, she made a series of inconsistent statements evincing what the court charitably called a “lack of candor.”
Horn,
From the outset, defendants Zsofka, Lee, and Lacroix had mounted a cooperative defense. Thus, the three of them were equally vulnerable to the misconduct that occurred. Not surprisingly, the trio moved to dismiss the case on the ground of prosecutorial misconduct.
2
The government objected. In evaluating the motions, the lower court ruled that the current selection during the discovery phase of a pending case offers insight into counsel’s thoughts, and, therefore, constitutes privileged work produсt.
See id.
at 745-47 (citing
In re San Juan Dupont Plaza Hotel Fire Litig.,
Finding prejudice, but not a stain so indelible as to justify dismissing the indictment, see id. at 751, the court stitched together a *759 serviceable fabric of narrowly tailored remedies, see id. at 751-52. The court ordered the government to provide the defense with summaries of its witnesses’ testimony and lists of its exhibits; permit the defense to depose the two potential witnesses who had been exposed to the bootleg documents; refrain from referring at trial to the substance of the documents except in response to defense references; and remove the lead prosecutor from the case. See id. at 752. Additionally, the court referred the lead prosecutor to the disciplinary committees of her two bar associations, and, in the portion of its order that sparked the current controversy, the court directed the government to pay the fees and costs incurred by the defendants in litigating the misconduct issue. See id. Although the court’s original order was inexpli-cit concerning the source of its authority to assess fees and costs, the court, in denying the government’s motion to reconsider, explained that it grounded this sanction in the judiciary’s supervisory power. See id. at 753-54.
Zsofka, Lee, and Lacroix stood trial early in 1993. They were each convicted on at least one count, and were sentenced in July. 3 On August 18,1993, the district court quantified its earlier order, assessing a grand total of $46,477.80 in fees and costs. The other sanctions have been carried out and the defense no longer presses the claim that the district court should have dismissed the indictment. Hence, all that remains of the case is the government’s appeal from the assessment of fees.
The government contests the award chiefly on the ground that it is prohibited by principles of sovereign immunity. 4 Extracted from its complicated factual predicate, drained of rancor, and separated from other, essentially extraneous disputes, this appeal requires us to serve as the dispatcher at a crossing where two powerful engines—the judiciary’s supervisory power and the government’s sovereign immunity—are on a collision course.
II. DOCTRINAL BACKGROUND
In ascertaining what happens when doctrines clash, derivation frequently becomes important. Thus, we turn to this task.
A. Supervisory Power.
Supervisory power, sometimes known as inherent power, encompasses those powers which, though “not specifically required by the Constitution or the Congress,”
United States v. Hasting,
Although the doctrine’s ancestry can be traced to the early days of the Republic,
see, e.g., Hudson,
In what is not necessarily an exhaustive listing, the Court has recognized three purposes to which the supervisory power may be dedicated: “to implement a remedy for violation of recognized rights, to preserve judicial integrity ... and ... as a remedy designed to deter illegal conduct.”
Hasting,
The supervisory power has definite limits.
See Hasting,
In particular, it is inappropriate for courts to attempt to use the supervisory power to justify an extreme remedy when, short of such heroic measures, the means are at hand to construct a satisfactory anodyne more narrowly tailored to the objective.
See Hasting,
It has been squarely held that a court’s array of supervisory powers includes the power to assess attorneys’ fees against either parties or their attorneys in befitting situations.
See Roadway Express,
*761 B. Sovereign Immunity.
The principle of sovereign immunity, in its primary form, dictates that the United States may not be sued except with its consent. This tenet was first stated,
ipse dixit,
by Chief Justice Marshall in
Cohens v. Virginia,
The secondary principle that monetary penalties cannot be collected from the federal government absent its consent was first articulated, in the narrow context of an assessment for costs, in
United States v. Hooe,
The Supreme Court recently removed any vestige of doubt that may have lingered as to whether these cases envisioned sovereign immunity as a bar not only to costs but also to attorneys’ fees.
6
See Ruckelshaus v. Sierra Club,
Thоse who seek a deep understanding of the law’s profundities are likely to find sovereign immunity a frustrating topic, for, from the very beginning, sovereign immunity has been “accepted as a point of departure unquestioned,”
Cunningham v. Macon & Brunswick R.R.,
Courts have mentioned two rationales for retaining the adapted doctrine in a democratic society. Some judges have theorized that it is necessary to protect the operations of government from undue interference and financial embarrassment.
See, e.g., Larson v. Domestic & Foreign Commerce Corp.,
Regardless of whether sovereign immunity rests on tradition, reason, or inertia, the doctrine is deeply entrenched in American law. Withal, Congress has liberally exercised its prerogative to abolish particular manifestations of the doctrine. See, e.g., 28 U.S.C. §§ 1346(b), 2671-2678, 2680 (Federal Torts Claims Act) (subjecting the government to suit for various torts); 28 U.S.C. § 1346(a), 1491 (Tucker Act) (subjecting the government to suit for damages in, inter alia, eon-tract cases); see also Derfner & Wolf, supra note 6 (listing statutes waiving governmental immunity to claims for counsel fees in various specialized contexts); cf. 18 U.S.C. § 3006A (Criminal Justice Act) (requiring government to pay counsel fees and other expenses on behalf of indigent criminal defendants).
In considering legislation that is claimed to have the effect of waiving sovereign immunity in a particular class of cases, courts usually have been guided by two maxims. First, a waiver of sovereign immunity must be definitely and unequivocally expressed.
See United States v. Mitchell,
Applying these tests, several courts have held that monetary sanctions for litigation abuse are not barred by sovereign immunity in certain classes of cases on the theory that an enacted statute, typically the Equal Access to Justice Act (EAJA), 28 U.S.C. § 2412 (allowing prevailing parties to recover fees from the government in certain civil and administrative proceedings), serves to waive the government’s immunity.
See, e.g., M.A. Mortenson Co. v. United States,
At the same time, monetary penalties under court rules have been found to be barred by sovereign immunity in other contexts.
See, e.g., United States v. Woodley,
To our knowledge, no court has considered on the merits the applicability of sovereign immunity to a monetary penalty assessed under the judiciary’s supervisory power in a criminal case. 10
III. ANALYSIS
In this case, the doctrines of sovereign immunity and supervisory power, each formi
*764
dable in its own right, are in unavoidable tension.
11
Despite the fact that, in recent years, the domain of sovereign immunity has tended to contract and the domain of supervisory power has tended to expand, we believe that sovereign immunity ordinarily will trump supervisory power in a head-to-head confrontation. The critical determinant is that the doctrines are of fundamentally diffеrent character: supervisory powers are discretionary and carefully circumscribed; sovereign immunity is mandatory and absolute. Consequently, whereas the former
may
be invoked in the absence of an applicable statute, the latter
must
be invoked in the absence of an applicable statute; and whereas the former
may
be tempered by a court to impose certain remedial measures and to withhold others, the latter
must
be applied mechanically, come what may. In other words, unlike the doctrine of supervisory power, the doctrine of sovereign immunity proceeds by fiat: if Congress has not waived the sovereign’s immunity in a given context, the courts are obliged to honor that immunity.
See, e.g., Meyer,
— U.S. at -,
The government tells us that this is precisely such a ease: since Congress has not acted, the government’s immunity to fee awards in criminal cases remains intact.. At first blush, the conclusion seems sound. We are able to discern only three avenues by which appellees arguаbly might tip-toe around this result. We trace each of these routes.
The most obvious detour around the barrier presented by sovereign immunity depends on waiver. If appellees can identify some statute or rule, and show that Congress thereby lifted the federal government’s sovereign immunity in this particular context, they would have an unobstructed path. But there is no such statute or rule applicable here — and appellees, to their credit, do not pretend that one exists.
The second detour embodies the assumption that, in appropriate cases, the judiciary possesses the naked power to override sovereign immunity. We believe that this avenue is a dead end. One of the main purposes of sovereign immunity is to guard against judicial interference in executive functions,
see Larson,
A third possible route around the barrier is to argue that, for whatever reason, the federal government’s sovereign immunity does not extend to monetary sanctions, such as punitive fee awards, levied under a court’s supervisory power. It is this avenue that appellees most vigorously explore. Shorn of rhetoric, they assert three basic reasons why the shield of immunity does not cover such situations. We mull each reason in turn.
*765 1. Reward v. Punishment. Appel-lees assert that, for purposes of sovereign immunity, the law historically has precluded fee-shifting only when it is employed as a reward to prevailing parties and not when it is employed as a punishment for litigation abuse. This foray suggests that what we have called the secondary principle of sovereign immunity — the tenet holding that the government is immune to monetary penalties imposed in court cases — precludes fee-shifting only when the shifted fees are intended to reward a prevailing party, and not when they are meant to reprimand a misbehaving party.
Appellees starts out on solid ground in the sense that the older eases discussing the secondary principle of sovereign immunity all involved monetary awards to prevailing parties directly attributable to litigatory success.
See, e.g., Fairmont Creamery,
Once we move beyond the realm of costs to attorneys’ feеs, appellees’ argument makes very little sense. Apart from a statute or rule so providing, counsel fees cannot be shifted as a reward to a prevailing party in any case, civil or criminal, whether or not the government is the fee target.
See Alyeska Pipeline,
The straw that snaps the camel’s back is that the appellees have offered no plausible explanation why the shield of immunity should leave the government exposed to fee awards designed as sanctions for litigation *766 abuse, but simultaneously protect it from fees or other monetary awards routinely given to prevailing parties as virtual bonuses to reward litigatory success. The simple, unarguable fact is that any and all such fee awards would deplete the public coffers, and, consequently, they all must stand on the same footing vis-a-vis principles of sovereign immunity. It follows inexorably that, absent a statute or rule effectuating a waiver, the secondary principle of sovereign immunity bars fee-shifting awards against the government, whatever their intended purpose.
2.
The Eleventh Amendment Analogy.
It is “settled that an award of attorney’s fees ancillary to prospective relief is not subject to the strictures of the Eleventh Amendment.”
Missouri v. Jenkins,
The Eleventh Amendment focuses exclusively on an immunity shared by the several States.
See
U.S. Const, amend. 11;
see also Hans,
3.
Separation of Powers.
Appellees’ final contention is that stripping away the power to assess monetary penalties in criminal cases would leave courts defenseless against litigation abuses committed by the government — which is, after all, a party to every criminal case in the federal system— and thereby would offend the separation of powers.
See McBride,
The fact that sovereign immunity forecloses the imposition of monetary sanctions against the federal government in criminal cases does not leave federal courts at the mercy of cantankerous prosecutors. Courts have many other weapons in their armamen-tarium. This case aptly illustrates the point. The district judge ordered, among other things, the removal and quarantine of the lead prosecutor, the suppression of tainted documents, and the advance disclosure of the government’s trial strategy. In addition, the judge could have ordered the lead prosecutor to pay the accumulated fees,
see Chilcutt,
Of course, there is a more broadly focused reason why the separation-of-powers argument will not wash. While sovereign immunity may marginally limit the courts’ ability to function, there is nothing sacrosanct about the courts’ power to impose sanctions. Congress has wide-ranging authority to limit supervisory powers generally.
See Chambers,
Our last response to appellees’ separation-of-powers argument is to note its indeterminacy. The same argument could be, and has been, turned 180 degrees. At least one highly respected scholar maintains that sovereign immunity “furthers the separation of powers by limiting judicial oversight of executive conduct ... [and thus] avoiding] situations where the courts will impose orders on the other branches of government that might be disregarded.” Erwin Chemirinsky, Federal Jurisdiction § 9.2.1, at 545-46 (2d ed. 1994) (emphasis supplied).
We will not paint the lily. Neither policy nor precedent supports the proposition that the separation of powers requires taking the quantum leap essayed by the court below. Leaving monetary imposts to one side, the range and reach of other sanctions, remedial and punitive, that are available to federal criminal courts permit those courts to administer their dockets and conduct judicial business with a sufficiently free hand. Courts, like litigants, must abide by certain rules— and to the extent that sovereign immunity curbs judicial power, the restraint is tolerable in the constitutional sense. In the last analysis, then, appellees’ contention that criminal courts are left impotent if they are deprived of the power to shift fees as a sanction against the government is as empty as a mendicant’s purse.
To summarize, none of the various possible detours manage to bypass the barrier of sovereign immunity. We hold, therefore, that fee-shifting against the government can be accomplished only in conjunction with the passage of a statute (or a sufficiently explicit rule having the force of a statute) that authorizes such an award. In the absence of such an enactment, the secondary principle of sovereign immunity saves the federal government harmless from all court-imposed monetary assessments, regardless of their timing and purpose.
IV. APPELLATE JURISDICTION
We have one more bridge to cross. It is hornbook law that a court cannot act in the absence of subject matter jurisdiction; and that, when such jurisdiction is lacking, a court is obliged to note the defect on its own initiative.
See United States v. Pierro,
A. Appeal as of Right.
The Appellate Rules require that an appellant’s brief contain “a statement of the basis for jurisdiction in the court of appeals ... with reference to the applicable facts to establish such jurisdiction.” Fed.R.App.P. 28(a)(2)(ii). Complying, perhaps, with the letter of the rule, but not with its spirit, the government’s brief states in a purely conclusory fashion only that its appeal is authorized under 28 U.S.C. § 1291 (1988). 16 Despite this blithe assurance, the government’s entitlement to an appeal as of right under section 1291 is problematic. We explain briefly.
An appeal by the government in a criminal case must be specifically authorized by statute.
See United States v. Sanges,
Notwithstanding this looming obstacle to appellate jurisdiction under section 1291, we believe that this case involves a sufficiently special set of circumstanсes to engage the exception rather than the rule. Some courts have suggested that, under what we choose to call the “special circumstance” exception, a government appeal may be entertained in a criminal case on the authority of section 1291 if the appeal satisfies the conditions of the so-called collateral order doctrine.
See, e.g., Carroll v. United States,
Moreover, the particular circumstances at hand, especially the procedural posture in which this appeal arises and the nature of the relief sought, are conducive to allowing the aрpeal to go forward. In criminal cases, the policy against permitting appeals to be taken too freely is heightened by speedy trial and double jeopardy concerns.
See Will v. United States,
We conclude, therefore, that we have jurisdiction over the instant appeal under 28 U.S.C. § 1291. We emphasize, however, that our holding is a narrow one. Rather than importing the collateral order doctrine lock, stock, and barrel into our criminal jurisprudence, we hold only that when, as now, the conditions of the collateral order doctrine are satisfied, 17 and the prudential concerns that traditionally militate against allowing the government to appeal in a criminal case favor, or are at least neutral in respect to, the availability of a government appeal, then section 1291 affords a vehicle through which the government may seek appellate review in a criminal ease.
B. Mandamus.
We are fortified in our resolve to hear and determine this appeal by the knowledge that, even if no appeal lies as of right, we possess — and can appropriately exercise — the power of discretionary review, via mandamus, 18 to address the important question raised in this ease.
A federal court of appeals has the power to treat an attempted appeal from an unappealable (or possibly unappealable) order as a petition for a writ of mandamus or prohibition under the All-Writs Act, 28 U.S.C. § 1651 (1988).
See, e.g., United States v. Sorren,
Advisory mandamus has its roots in the Court’s reference to mandamus review of “basic, undecided question[s].”
Schlagenhauf v. Holder,
If no right of appeal were to exist, the case before us today would bе a prime candidate for advisory mandamus. The issue presented has never before been squarely decided; yet, it is likely to recur, given the pervasiveness of litigation abuse in modern practice. There is a sufficient showing of irreparable harm in the sense that, were no court to entertain either an appeal or a petition for mandamus, the matter might perpetually evade review. Finally, the issue bears importantly on the relationship between the Judicial Branch and the Executive Branch.
We regard the case for mandamus here as especially compelling because it is important in the right way. It poses an elemental question of judicial authority — involving precisely the sort of “Article Ill-type jurisdictional considerations” that traditionally have triggered mandamus review.
In re Justices,
in short, we believe that this attempted appeal, if not entertainable as of right under 28 U.S.C. § 1291, would present a classic ease for the granting of advisory mandamus. Either way, the government is entitled to the relief that it seeks.
y. CONCLUSION
Having satisfied ourselves that appellate jurisdiction inheres, we now recapitulate. We agree with the lower court that the government committed egregious acts of prose-cutorial misconduct. We do not believe, however, that the court had the right to ignore sovereign immunity in responding to that misconduct. The court’s supervisory power, although potent, cannot intrude, unaided, into the sovereign’s protected preserves.
We need go no further. Because principles of sovereign immunity bar a federal court from invoking its supervisory power to compel the federal government to pay attorneys’ fees and costs as a sanction for prose-cutorial misconduct in a criminal case, we reverse the orders оf the district court insofar as they purport to shift such fees and costs. All parties shall bear their own costs in this court.
Reversed. No costs.
Notes
. The district court made a deliberate decision to spare the lead prosecutor public humiliation and revised its order before publication to delete any mention of the prosecutor’s name. Although we, if writing on a pristine page, might not be so solicitous, we honor the district court's exercise of its discretion, mindful that its choice has substantive implications.
Cf. United States v. Hasting,
. For ease in reference, we call Zsofka, Lee, and Lacroix "the appellees.” Withal, we note that the district court permitted three other defendants — Richard Horn, Patrick Dion, and Patricia Dion — to join in the request for dismissal.
See Horn,
. The other four defendants pled guilty at various times. They were all sentenced in May of 1993.
. The government also maintains that it could not have violated any applicable work-product privilege, and cannot be penalized for so doing, because the defense waived any such privilege by making voluntary disclosures to a government agent, namely, the Aspen office worker. Because we agree that the government is shielded from the monetary award by principles of sovereign immunity, we take no view of this asseveration.
. It is not yet settled whether some residuum of the courts' supervisory power is so integral to the judicial function that it may not be regulated by Congress (or, alternatively, may only be regulated up to а certain point). In this connection, we note that, although some courts of appeals have attempted to subdivide the supervisory power into three categories ranged along a continuum according to their degree of necessity, and, concomitantly, the extent to which they may be subject to congressional limitation,
see In re Stone,
. We think it is unlikely that such doubts were entertained in earnest. After all, Congress would not have felt impelled to enact the many statutes waiving immunity to attorneys' fees, see 1 Mary Frances Derfner & Arthur D. Wolf, Court Awarded Attorneys' Fees ¶ 5.03[12][b] (1993) (catalogu-ing statutes), unless it understood that, in the absence of such statutes, attorneys’ fees would not be recoverable against the federal sovereign.
. For its part, the scholarly community has been overwhelmingly hostile to the doctrine, often denouncing it as mischievous formalism, see Kenneth Culp Davis, Suing the Government hy Falsely Pretending to Sue an Officer, 29 U.Chi.L.Rev. 435, 436-38 (1962), with little basis in English history, see Louis L. Jaffe, Suits Against Government and Officers: Sovereign Immunity, 77 Harv. L.Rev. 1, 2-19 (1963), and antithetical to the democratic spirit, see John E.H. Sherry, The Myth that the King Can Do No Wrong, 22 Admin.L.Rev. 39, 56-57 (1969).
. At least one writer has expressed grave reservations about these decisions. See Timothy J. Si-meone, Comment, Rule 11 and Federal Sovereign Immunity: Respecting the Explicit Waiver Requirement, 60 U.Chi.L.Rev. 1043, 1052-57 (1993) (criticizing cases employing the narrow and broad rationale alike as inconsistent with the Court's rigid adherence in recent years to the unequivocal expression requirement).
. The statute provides:
A court of the United States shall have power to punish by fine or imprisonment, at its discretion, such contempt of its authority, and none other, as—
(1) Misbehavior of any person in its presence or so near thereto as to obstruct the administration of justice;
(2) Misbehavior of any of its officers in their official transactions;
(3) Disobedience or resistance to its lawful writ, process, order, rule, decree, or command.
18 U.S.C. § 401.
. Although the district court in
Woodley
shifted fees against the government partially in reliance on its supervisory power, the Ninth Circuit overturned the fee award, reasoning on this issue that the availability of other sanctions precluded the court from unleаshing its supervisory power.
See Woodley,
Our research has also unearthed an occasional near miss. For example, in
Andrulonis v. United States,
. We see no way to avoid this tension by upholding the fee award on an alternative ground. While government counsel's disobedience and deception of the court perhaps could have been punished under the contempt statute, 18 U.S.C. § 401, and the entire fiasco, if conceived as a discovery violation within the ambit of Fed. R.Crim.P. 16(b)(2), might have been punishable under the broadly worded sanction authority of Fed.R.Crim.P. 16(d)(2), these possibilities afford no hope of averting a head-on collision between judicial power and sovereign immunity. In the first place, the district court’s order made it pellucid that supervisory power comprised the sole foundation on which the monetary sanction rested.
See Horn,
. At early common law, costs were awarded to prevailing parties as a matter of course in all cases.
See
Arthur L. Goodhart,
Costs,
38 Yale L.J. 849, 851-53 (1929). Before the adoption of the Civil Rules, costs werе generally awarded to prevailing parties as a matter of right in actions at law, and at the judge's discretion on the equity side.
See Ex parte Peterson,
. In this regard, fines for civil contempt under 18 U.S.C. § 401, quoted
supra
note 9, are of special interest because contempt originated as an aspect of the supervisory power,
see Shillitani v. United States,
. There would seem to be no sovereign immunity bar to imposing a monetary penalty as a sanction against a rogue attorney merely because she happens to represent the federal government.
See Larson,
. Although the district court eschewed these additional remedies, the Justice Department later engaged its internal disciplinary mechanism on its own initiative.
. The statute provides in pertinent part, with exceptions not relevant here, that “the courts of appeals ... shall have jurisdiction of appeals from all final decisions of the district courts of the United States....” 28 U.S.C. § 1291.
. We are not the first court to deem an assessment against the government
qua
prosecutor to be a collateral order for jurisdictional purposes.
See United States v. Baker,
. Technically, this case calls for the issuance of a writ of prohibition rather than a writ of mandamus. Because prohibition is simply the obverse of mandamus — the two writs derive from the same source,
see
28 U.S.C. § 1651, and incorporate the same standards — we often use the two terms interchаngeably.
See In re Pearson,
.We think it is wise to distinguish supervisory mandamus from advisory mandamus. The former is used when an appellate court issues the writ to correct an established trial court practice that significantly distorts proper procedure.
See, e.g., United States v. Kane,
. Because situations that properly call for the use of advisoiy mandamus “are hen's-teeth rare,”
In re Bushkin,
