The issue in this appeal is the standard that governs a district court’s decision to deny a party’s motion on behalf of a nonresident attorney for admission pro hac vice. The district court denied admission pro hac vice to plaintiffs counsel, even though it did not find that the attorney had violated any specific ethical rules. We hold that binding circuit precedent requires a showing , of unethical conduct of such a nature as to justify disbarment of a lawyer admitted generally to the bar of the district court in order to justify the denial of an applicant’s pro hac vice admission. Accordingly, we vacate the district court’s order denying counsel’s admission pro hac vice and remand for further proceedings.
I. BACKGROUND
This interlocutory appeal of the district court order denying admission pro hac vice to Roger M. Witten, counsel for Schlumberger Technologies, Inc. (“Schlumberger”), arises from a lawsuit filed by Schlumberger *1555against former officers and directors of its wholly owned subsidiary, Global TePLink Corporation (“Global”). The defendants, G. Dan Wiley, Robert A. Fergusson, and Donald Bahouth, were the most senior officers of Global, and the first two were also directors of Global, until Sehlumberger terminated their employment in February 1994 as a result of a legal audit of Global.
On April 1, 1993, Sehlumberger acquired Global, which is headquartered in Mobile, Alabama, and whose principal line of business involved the manufacture and sale of communication services, predominantly automated pay telephones for prison systems. In the fall of 1993, Louisiana newspapers reported allegations that Global had overcharged customers in its contract with the Louisiana Department of Corrections, and the Louisiana Public Service Commission started an informal investigation into Global’s operations in that state. In October 1993, Sehlumberger retained the Washington, D.C. law firm of Wilmer, Cutler & Pickering (‘WC & P”) to provide advice on communications law issues. In December 1993, Schlumberger further retained WC & P to assist in a legal audit of Global and selected Witten, a WC & P partner, to lead the audit team. The audit team included other WC & P lawyers, lawyers from the Mobile, Alabama law firm of Helmsing, Lyons, Sims & Leach, and accountants from Price Waterhouse (“PW’). The legal audit began on January 10,1994 and continued for approximately one month. At an initial informational meeting on the first day of the audit, Witten explained to Global middle and upper management personnel the process of the legal audit and told them that they would be interviewed by the audit team. Witten stated that the WC & P lawyers involved in the audit represented Sehlumberger and were not lawyers for any of Global’s employees or management. Dale Gaudier, in-house counsel for Sehlumberger, distributed to Global employees a memorandum (“the Gaudier memo”) dated January 10, 1994, stating in relevant part:
Sehlumberger considers this review, and the information it and PW and WC & P gather during the review, to be confidential You should not discuss or disclose to those outside Global the fact that a review is taking place or the nature of the review. You should also not discuss the substance of any conversations you may have with PW, WC & P or Sehlumberger legal personnel with anyone inside or outside Global.
R3-Def. Exh. 1.
The audit team then secured Global’s premises as well as its documents and computer files, and started interviewing Global employees. At the start of each interview, including those with Bahouth and Fergusson, Witten explained again that he represented Sehlumberger, that he did not represent the interviewee personally, and that he could not guarantee that Sehlumberger would not disclose any statements made by the interviewee.1 Witten and other members of the audit team interviewed Bahouth and Fergusson last, on January 17 to 18 and on January 18, respectively. As a result of the audit, Sehlumberger concluded that Global had engaged in extensive consumer fraud and other unlawful practices while under defendants’ management. Sehlumberger voluntarily disclosed its findings to the appropriate state law enforcement and regulatory authorities and undertook to make restitution to the defrauded consumers. Sehlumberger also fired the defendants for cause and commenced this suit in federal district court, alleging fraud under federal securities laws and Alabama law. Witten and local counsel signed the complaint.
Fergusson filed a motion, later joined by Wiley and Bahouth, to deny admission pro hoc vice to Witten, alleging that Witten acted unethically during the interview with Fergus-son.2 In an affidavit attached to his motion, *1556Fergusson stated that, based on his observation of the audit team during the period preceding his interview and conversations with Global employees who had been interviewed, he had reason to suspect that he and others might be the targets of the investigation. Fergusson also claimed that he asked at the outset of the interview whether he should have a lawyer present and that Wit-ten assured him that he need not. Bahouth later filed an affidavit making similar allegations.
In Sehlumberger’s opposition to Fergus-son’s motion to bar Witten’s admission, Schlumberger denied that Fergusson asked whether he should have a lawyer at any time during his interview and asserted that none of the three members of the audit team who participated in the interview advised Fergus-son in any way on whether he should have a personal lawyer. Schlumberger stated that, during the interview, Fergusson said that he might want to consult a lawyer in the future in his capacity as a shareholders’ representative. According to Schlumberger, Witten did not give Fergusson any advice as to that matter and his only response was that Fergusson was being interviewed solely in his capacity as an officer and employee of Global.3
The district court held an evidentiary hearing on June 2, 1994. Both Witten and Fergusson testified, essentially repeating the claims in their respective affidavits. During Fergusson’s direct examination, however, the district court interrupted the examination and asked Fergusson whether the Gaudier memo was ever modified during the course of the audit. When Fergusson answered in the negative, the court opined that the statement, ‘You should also not discuss the substance of any conversations you may have with PW, WC & P or Schlumberger legal personnel with anyone inside or outside Global,” contained in the Gaudier memo meant that Global employees were precluded from talking to a personal lawyer regarding the audit.4 R3-56.
The district court denied Witten’s admission pro hac vice at the end of the hearing. The court did not make any formal findings of facts and conclusions of law at that time, but gave the following reasons, which we construe as the court’s findings of fact: (1) the purpose of the legal audit team investigation was to “get some dirt on [the defendants] before they got lawyers”; (2) Fergus-son claims that he asked for a lawyer and even Witten does not deny that the subject of a lawyer was brought up; and (3) the language of the Gaudier memo, coupled with the fact that the subject of a lawyer was brought up in Fergusson’s interview, would be taken by any layman as precluding him from consulting with a personal lawyer. R3-114 & 115. The court concluded: “So I feel that *1557[Mr.] Witten ... [was] acting in a fashion which this Court terms to be unethical. And therefore, since this Court terms it to be unethical, the Court will not admit [him] to practice pro hac vice in this case.” R3-115.
Schlumberger filed a motion for reconsideration, supported by declarations of former Fifth Circuit Judge and Attorney General Griffin B. Bell, former Eighth Circuit Judge and Director of the Central Intelligence Agency William H. Webster, and Yale Law Professor Geoffrey C. Hazard. The three declarants supported Schlumberger’s contention that Witten did not violate any rules of ethical conduct in not affirmatively advising the defendants to retain personal counsel and that the Gaudier memo was a standard memorandum routinely used in similar circumstances to preserve the corporate attorney-client privilege in accordance with Upjohn. The declarants asserted that, in their experience, the Gaudier memo comported with prevalent practice and that they have never had any experience with anyone interpreting such a memorandum to preclude consultation with a personal attorney.
The district court issued a written order in whieh it denied Schlumberger’s motion to reconsider the court’s denial of admission pro hac vice to Witten. The court did not make any new findings of fact in its order. It held, however, that denying Witten’s admission based on the facts as it found them at the June 2 hearing was within its discretion. The court also struck the declarations of Bell, Webster, and Hazard because it interpreted them as disputing the district court’s factual finding that the effect of the Gaudier memo on the defendants was to preclude them from consulting legal counsel. Thus, the court concluded that these affidavits did not aid the court because it was “completely capable of handling on its own” this factual issue. Id. at 16-17.
The district court certified an appeal to this court pursuant to 28 U.S.C. § 1292(b) on the portion of its order denying admission pro hac vice of Witten.5 The court declined to certify the portion of its order striking the declarations of Bell, Webster, and Hazard.6
II. DISCUSSION
A. Standard of Review
The district court’s determination of the appropriate legal standard that governs this case and its interpretation of that standard is subject to de novo review. See United States v. Mendoza-Cecelia, 963 F.2d 1467, 1471 (11th Cir.1992). Within the framework of the legal standard governing the court’s decision to deny pro hac vice admission, the parties disagree as to the standard of review applicable to the court’s determinations. In cases involving attorney disqualifications, we have used two apparently inconsistent standards of review. See generally Norton v. Tallahassee Mem’l Hosp., 700 F.2d 617, 618-20 (11th Cir.1983) (“Norton II”) (“[C]ourts have not always been careful to enunciate their reasons for exercising one type of review ... — traditional review of factual findings and legal conclusions or review of abuse of discretion____”). In Norton II, we held that the district *1558court’s factual determinations are reviewed under the clearly erroneous standard, but that the court’s “application of] the standards of the Code of Professional Responsibility to questions of attorney disqualification warrant full appellate review to ensure that there is consistency of treatment.” Id. at 619-20. On other occasions, we have reviewed a district court’s decision to revoke an attorney’s admission pro hac vice for an abuse of discretion. See United States v. Dinitz, 538 F.2d 1214, 1219 (5th Cir.1976) (en banc); Nationalist Movement v. City of Cumming, 913 F.2d 885, 895 (11th Cir.1990), aff'd sub nom. on other grounds, Forsyth County v. Nationalist Movement, 505 U.S. 123, 112 S.Ct. 2395, 120 L.Ed.2d 101 (1992).
This apparent inconsistency disappears, however, when we consider the particular circumstances and timing of the court’s disqualification of an attorney in these cases. Indeed, we explained in Norton II that these circumstances dictate the extent of the district court’s discretion and, therefore, the scope of our review. We explained that, in a case like Dinitz, the abuse of discretion standard is applicable because “that particular disqualification decision [was] so closely linked to the trial judge’s responsibility to supervise the conduct of the case before him.” Norton II, 700 F.2d at 619. We stressed that, in Dinitz, “the trial court’s ... judgment was based on conduct he had observed.” Id. (emphasis added) Similarly, in Nationalist Movement, the district court revoked an attorney’s pro hac vice admission after that attorney persisted, during the trial, in a course of conduct that can only be described as “an effort to commit a fraud on the court.” Nationalist Movement, 913 F.2d at 895. The deference that we accorded the trial judges in both Dinitz and Nationalist Movement was necessary so that the trial judge could maintain effective control over his or her court room and process. Id. at 895 (“[T]his case presents unique facts involving the integrity of the court system and respect for its participants within a courtroom proceeding.”). In contrast, the district court’s disqualification decision in Norton II turned on the proper application of the Rules of Professional Conduct, not on the court’s response to an attorney’s in-court disruptive behavior. See Norton v. Tallahassee Mem’l Hasp., 689 F.2d 938, 941-42 (11th Cir.1982) (“Norton I”) (reversing the district court’s disqualification order based on a violation of Canon 9 of the Florida Rules of Professional Conduct), reh’g denied, Norton II, 700 F.2d at 620. In reviewing a district court’s interpretation and application of the Rules of Professional Conduct, which involve a mixed question of law and fact, we do not defer to the district court’s determinations. See Norton II, 700 F.2d at 620; In re Finkelstein, 901 F.2d 1560, 1563-64 (11th Cir.1990).
Even though Witten’s conduct is related to the case at bar, that conduct occurred before the action was ever filed, did not occur in front of the district court, and was not of a type to disrupt the proceedings before the court. Moreover, as we shall explain below, the court’s decision to deny Witten’s admission turns on its application of the relevant Rules of Professional Conduct. Therefore, in accordance with Norton II, we review the district court’s factual findings for clear error and its application of the Rules to the facts de novo.
B. Analysis
In denying Witten admission, the district court interpreted our decision in In re Evans, 524 F.2d 1004 (5th Cir.1975), to govern only the procedural requirements for denying admission pro hac vice to an attorney. The court held that, once a complaint alleging misconduct rising to the level of disbarment is made, the district court has broad discretion to deny admission pro hac vice after notice and a hearing, without necessarily finding that the misconduct actually rose to a level justifying disbarment. For this proposition, the district court cited Dinitz, 538 F.2d at 1219, Kleiner v. First National Bank, 751 F.2d 1193, 1209 (11th Cir.1985), and Nationalist Movement, 913 F.2d at 895. Thus, although “[t]he [c]ourt did not find that Witten violated any specific ethical rules, as would be required for disbarment,” it denied Witten’s admission because the “[defendants here submitted ‘evidence of behavior that [the court] believefd] justifie[d] denying an attorney admission pro hac vice.’ ” R2-177*155914 (alterations in original) (quoting Evans, 524 F.2d at 1008).
In Evans, we enunciated both a procedural standard and a substantive standard for a district court’s decision to deny admission pro hac vice to an attorney. First, “[i]f a District Court has evidence of behavior that it believes justifies denying an attorney admission pro hac vice,” it must give the attorney adequate notice of the ethical charges and set a hearing on the issue. Evans, 524 F.2d at 1008. The district court believed in this case that the evidence against Witten rose to the threshold set in Evans for a hearing. The court mistakenly believed, however, that it had the authority to deny an attorney admission pro hac vice because it believed the evidence justified such action, without any farther findings. This was error, because the district court disregarded the substantive standard set out in Evans:
Admission to a state bar creates a presumption of good moral character that cannot be overcome merely by the whims of the District Court. An applicant for admission pro hac vice who is a member in good standing of a state bar may not be denied the privilege to appear except “on a showing that in any legal matter, whether before the particular district court or in another jurisdiction, he has been guilty of unethical conduct of such a nature as to justify disbarment of a lawyer admitted generally to the bar of the court.”
Evans, 524 F.2d at 1007 (quoting Sanders v. Russell, 401 F.2d 241, 247-48 (5th Cir.1968)). The district court specifically disclaimed in its order a finding of disbarable conduct on Witten’s part, as is required under Evans. Therefore, its decision to deny Witten admission pro hac vice was error.
The district court’s reliance on post-Evans cases giving district courts wider latitude to revoke an attorney’s admission pro hac vice is misplaced. In a footnote, the district court cited Kirkland v. National Mortgage Network, Inc., 884 F.2d 1367 (11th Cir.1989), for the proposition that “the Supreme Court’s decision in Leis v. Flynt, 439 U.S. 438, 443-45, [99 S.Ct. 698, 701-02, 58 L.Ed.2d 717] (1979), may have partly undermined Evans insofar as the Supreme Court made clear that ‘no Fourteenth Amendment property interest is implicated by a state court’s refusal to admit an attorney pro hac vice.’ ” R2-177-12 n. 16 (quoting Kirkland, 884 F.2d at 1371). In Kirkland, the district court revoked an attorney’s admission pro hac vice without giving him notice of the charges against him or affording him a hearing. We reversed the district court’s decision because it failed to comply with the procedural requirement of Evans. Kirkland, 884 F.2d at 1372. Therefore, the Kirkland court’s statement casting doubt on the continued vitality of Evans’ substantive standard is pure dictum, which is not binding on us. Indeed, it is not clear why a decision holding that a federal court cannot review a state court’s denial of admission pro hac vice because that denial does not implicate a Fourteenth Amendment property interest would have any bearing on our decision in Evans. In Evans, we did not rest our decision on any purported constitutional right for an attorney to be admitted pro hac vice in a federal court. We, instead, exercised our supervisory authority over the district courts in this circuit to circumscribe the discretion of trial judges in deciding whether to admit an attorney pro hac vice. For this reason, we rejected the Fourth Circuit’s standard which gives district courts the discretion “to deny admission pro hac vice to an attorney guilty of ‘unlawyerlike conduct’ ” because we found “the discretion permitted by the Fourth Circuit too broad and, consequently, susceptible to abuse.” Evans, 524 F.2d at 1007 n. 1 (citing Thomas v. Cassidy, 249 F.2d 91 (4th Cir.1957)). We conclude that, contrary to the dictum in Kirkland, the Supreme Court’s decision in Leis did not cast doubt on Evans’ holding. Evans, therefore, remains binding precedent in this circuit.
Nonetheless, the defendants suggest that Eleventh Circuit precedent on the issue of attorney disqualification has evolved into two different lines of decision, one exemplified by Evans and the other by Dinitz and Nationalist Movement, and that the district court correctly relied on the latter to deny Witten’s admission. We disagree. First, we distinguished Evans in Dinitz because
*1560 Evans merely attempted to establish standards applicable to a pretrial motion to appear pro hac vice---- Once an attorney has been admitted pro hac vice and a case has proceeded to trial, however, the considerations are quite different. The interests of justice demand that a judge have a measure of discretion to take steps necessary to ensure that order is maintained.
Dinitz, 538 F.2d at 1223-24. Therefore, as Dinitz itself teaches, Evans controls here because this case involves a pre-trial motion for admission pro hac vice.
Second, a more complete review of Eleventh Circuit precedent on the issue of attorney disqualification shows that the district court’s reading of that case law is erroneous. As we explained in our discussion of the standard of review applicable to this case, there are two distinct lines of Eleventh Circuit decisions on attorney disqualification, but these two lines can be reconciled if we consider the particular circumstances of each case. In Dinitz and Nationalist Movement, we were faced with “unique facts involving the integrity of the court system and respect for its participants within a courtroom proceeding.” Nationalist Movement, 913 F.2d at 895. In both Dinitz and Nationalist Movement, the district court revoked an attorney’s admission pro hac vice after repeated warnings due to the attorney’s persistence in ethically questionable conduct that occurred in the courtroom, in the view of the district court, and that resulted in a disruption of the proceedings. See Nationalist Movement, 913 F.2d at 893 (Attorney actions included: “presenting ... a witness to authenticate corporate documents ... [in] an attempt to create fraud on the court; making frivolous objections ... to prevent the truth from emerging about [the witness’s] lack of qualifications to testify; concealing from the court his personal interest in the litigation ...; and asking an adverse witness whether he was a veteran, in an effort to embarrass and disparage him.”); Dinitz, 538 F.2d at 1220-21 & nn. 8-10 (“The disruptive effect of [the attorney’ls conduct is evident when we consider that the court was forced to delay the beginning of the trial to hear testimony on a suppression motion that was utterly frivolous, to warn the attorney repeatedly about specific instances of misconduct, and to send the jury out of the courtroom no less than three times during the course of his opening statement.”). The circumstances of this case clearly do not involve such “unique facts.” 7
By contrast, in eases where the district court’s decision to disqualify an attorney was based on an alleged ethical violation, we carefully reviewed the court’s interpretation and application of the Rules of Professional Conduct. See Norton I, 689 F.2d at 941-42 (reversing the district court’s disqualification order based on a violation of Canon 9 of the Florida Rules of Professional Conduct). In a more recent case, we reversed a district court’s decision disqualifying an attorney for conduct which, according to the district court, was so reprehensible as to “transgress[ ] a ‘code’ by which an attorney practices which transcends any written code of professional conduct.” Finkelstein, 901 F.2d at 1563. Finkelstein involved the following circumstances: In the interim period between the liability phase and the damages phase of a lengthy civil rights trial, and after the district court had encouraged the parties to negotiate a settlement, the attorney “leapfrogged” defendant’s trial attorney and sent a settlement letter directly to defen*1561dant’s corporate counsel. The tone of the letter was inappropriately threatening. See id. at 1562-63. The district court understandably found such conduct reprehensible and disqualified the responsible attorney on that basis. Upon review, “[w]e share[d] the disapproval of the district court caused by Finkelstein’s letter to [corporate counsel]. It not only ‘exhibited an unlawyerlike rudeness’ but it also displayed a gross misunderstanding of true professionalism.” Id. at 1564 n. 4. Nonetheless, we reversed because the district court may not disqualify an attorney on the basis of some “transcendental code of conduct ... that ... existed only in the subjective opinion of the court, of which [the attorney] had no notice, and [that] was the sole basis of the sanction administered after the conduct had occurred.” Id. at 1565. Thus, where the district court’s disqualification order is based on an allegation of ethical violation, the court may not simply rely on a general inherent power to admit and suspend attorneys, without any limit on such power. The court must clearly identify a specific Rule of Professional Conduct which is applicable to the relevant jurisdiction and must conclude that the attorney violated that rule — a legal conclusion subject to full appellate review — for its order to be upheld. See Norton I, 689 F.2d at 941. Moreover, as we stated in Finkelstein, “[t]his Court will ‘not deprive an attorney of the opportunity to practice his profession on the basis of a determination after the fact that conduct is unethical if responsible attorneys would differ in appraising the propriety of that conduct.’ ” Finkelstein, 901 F.2d at 1565 (quoting In re Ruffalo, 390 U.S. 544, 556, 88 S.Ct. 1222, 1229, 20 L.Ed.2d 117 (1968) (White, J., concurring)).
In sum, our circuit’s law governing district courts’ decisions to deny a motion for admission pro hac vice or to disqualify an attorney already admitted to appear before the court is not inconsistent. It is sensibly tailored to circumscribe the discretion of trial judges to suit the particular circumstances of a given case. The standards governing a district court’s denial of a pre-trial motion for admission pro hac vice are set out in Evans: Absent a showing of unethical conduct rising to a level that would justify disbarment, the court must admit the attorney. Evans, 524 F.2d at 1007. The standards governing disqualification of an attorney already admitted to appear before the district court differ, depending on the circumstances. If the conduct at issue threatens disruption of the court proceedings, see, e.g., Dinitz, 538 F.2d at 1221 (in-court misconduct) and Nationalist Movement, 913 F.2d at 893 (same), or is a deliberate challenge to the authority of the district court, see, e.g., Kleiner, 751 F.2d at 1207 (attorney deliberately advising client to disobey the district court’s protective order), we give great deference to a trial court’s decision to disqualify the responsible attorney. If, however, the conduct at issue does not threaten the orderly administration of justice but is allegedly unethical, we insist that district courts rest their disqualification decisions on the violation of specific Rules of Professional Conduct, not on some “transcendental code of conduct ... that ... exist[s] only in the subjective opinion of the court.” Finkelstein, 901 F.2d at 1565.8
Based on our review of the governing ease law, we conclude that the district court incorrectly construed the scope of its discretion. Because this case involves a pre-trial motion for admission pro hac vice, it is controlled by the standard enunciated in Evans. The district court’s order denying Witten admission *1562 pro hac vice is vacated because “[t]he court did not find that Witten violated any specific ethical rules, as would be required for disbarment.” R2-177-14.9
The district court in this case was mindful that “[accusations of unethical conduct are among the most serious of allegations that [a c]ourt must consider ... [and] aware that an attorney’s honor as an officer of the [cjourt is at issue here.” R2-177-15 (internal quotation marks omitted). We share the district court’s sense of gravity over this issue, because “the ‘brand of disqualification’ on grounds of dishonesty and bad faith could well hang over [an attorney’s] name and career for years to come.” Kirkland, 884 F.2d at 1370 (holding that a district court’s order disqualifying an attorney is reviewable by this court even after the underlying case has settled because of the gravity of the accusations of unethical conduct); Kleiner, 751 F.2d at 1200 n. 14. These considerations should weigh even more heavily when (and if) the district court rules upon remand on Witten’s admission pro hac vice. Because Evans requires a showing of disbarrable conduct in order to justify the denial of Witten’s admission, the district court must be further mindful that “the power [to disbar] is one that ought always to be exercised with great caution; and ought never be exercised except in clear cases of misconduct, which affect the standing and character of the party as an attorney.” Ex parte Wall, 107 U.S. 265, 288, 2 S.Ct. 569, 588, 27 L.Ed. 552 (1883) (emphasis added); cf. ABA Model Rules for Lawyer Disciplinary Enforcement Rule 18(C) (1993) (providing that charges of misconduct “shall be established by clear and convincing evidence”); Alabama Rules of Disciplinary Procedure Rule 19 (1995) (“Clear and convincing evidence shall be the standard of proof required in all disciplinary proceedings____”). Moreover, the court should “ ‘not deprive an attorney of the opportunity to practice his profession on the basis of a determination after the fact that conduct is unethical if responsible attorneys would differ in appraising the propriety of that conduct.’” Finkelstein, 901 F.2d at 1565 (quoting In re Ruffalo, 390 U.S. at 556, 88 S.Ct. at 1229 (White, J., concurring)).10
III. CONCLUSION
The issue in this appeal is the standard that governs a district court’s decision to deny a party’s motion on behalf of a nonresident attorney for admission pro hac vice. The district court denied admission pro hac vice to plaintiffs counsel, even though it did not find that he violated any specific ethical rules. We hold that binding circuit precedent requires a showing of unethical conduct of such a nature as to justify disbarment of a lawyer admitted generally to the bar of the *1563district court in order to justify the denial of an applicant’s pro hoc vice admission. Accordingly, we VACATE the district court’s order denying Witten admission pro hoc vice and REMAND for further proceedings consistent with this opinion.