¶1 — Attorney Jeffrey T. Haley appeals the recommendation of the Disciplinary Board of the Washington State Bar Association (Board) that he serve two six-month suspensions pursuant to counts 2 and 3 of his disciplinary proceedings. Regarding count 2, the Board determined that Haley was subject to a six-month suspension for knowingly violating RPC 4.2(a), which provides that, “[i]n representing a client, a lawyer shall not communicate . . . with a party . . . represented by another lawyer.” The Board concluded as to count 3 that Haley was subject to a six-month suspension for knowingly violating RPC 1.7, which prohibits a lawyer from representing a client if the representation is “directly adverse to another client” or “may be materially limited by. . . the lawyer’s own interests.” RPC 1.7(a), (b). The Board recommended allowing Haley to serve the two six-month suspensions concurrently. The Washington State Bar Association (WSBA) agrees that two six-month suspensions are appropriate but maintains that the suspensions should run consecutively.
Owens, J.¶2 Although we hold that, under RPC 4.2(a), a lawyer acting pro se is prohibited from contacting a party represented by counsel in the matter, we apply our interpretation *328of RPC 4.2(a) prospectively only and dismiss the violation alleged in count 2. We agree that the presumptive sanction for Haley’s knowing violation of RPC 1.7 is a suspension, but we conclude that a departure from the Board’s recommendation is warranted, particularly in light of the considerable delay in reporting and prosecuting the misconduct. For Haley’s violation of RPC 1.7, we therefore impose a reprimand.
FACTS
¶3 Counts 2 and 3 of the WSBA’s complaint against Haley arose out of separate sets of events that occurred in 1996-1997 and 1988-1991, respectively. Haley does not challenge any finding of fact as made by the hearing examiner or adopted by the Board. Accordingly, such facts are considered verities on appeal to this court. In re Disciplinary Proceeding Against Brothers, 149 Wn.2d 575, 582, 70 P.3d 940 (2003).1
¶4 Count 2. In 1994, Haley filed a lawsuit against Carl Highland, the former chief executive officer of a defunct closely held corporation, Coresoft, of which Haley was formerly a shareholder and board member. Initially, Haley acted pro se in the matter but hired counsel when the case went to trial in November 1995. After the trial ended, Haley’s counsel filed notice of withdrawal and Haley reverted to pro se status as to appeal and collection issues. Highland was represented by various attorneys at all times during this matter, and Haley knew that Highland was consistently represented by counsel.
¶5 The hearing officer and Board concluded that Haley’s improper contact with a represented party arose out of two incidents. First, while Haley was acting pro se after the trial, he sent a letter to Highland and his wife, proposing *329settlement. The letter was dated September 9, 1996, and stated in full as follows:
“I am about to spend approximately $25,000 on costs and attorneys fees for the appeal. If the appeal is successful, the personal earnings of both Ronda Hull and Carl Highland will be subject to garnishment to satisfy my judgment and the judgment now held by Carl Highland will be overruled. Also, the amount I am about the [sic] spend on costs and attorneys fees will be added to the judgment.
“This is the last opportunity to settle the case before I spend the money on the appeal. This settlement offer will not be open after this week and may be withdrawn at any time if it is not promptly accepted. I am offering that all claims and judgments between the parties be releases [sic] with no payments. Please respond directly to me.”
Decision Papers (DP) at 38. Highland forwarded the letter to his attorney who, in turn, suggested to Haley that the letter constituted a violation of RPC 4.2(a) and warned him not to have any further contact with Highland. Second, on January 31, 1997, Haley again contacted Highland, this time by telephone. Haley left the following voice message on Highland’s phone:
“Carl, this is Jeff Haley ....
“I hope your attorneys have told you . . . Jim Bates decided that your judgment against me is collectable only from my separate assets and I have none; they’re all community assets. And, therefore, your judgment is uncollectable [sic]. And the chance for appeal of that determination by Jim Bates has rim so you can’t appeal it... so that if the appeal proceeds my position can only improve and yours can only get worse and if you have nothing collectable . . . there’s no chance of ever getting anything collectable. It seems to me that we ought to settle this case and if we do so Monday . . . there’ll be an opportunity on Monday to do so if you’re interested. Give me a call.”
DP at 41.
¶6 In his “Amended Findings of Fact and Conclusions of Law,” the hearing officer stated that Haley’s letter and phone message were “clearly prohibit [ed]” by RPC 4.2(a), *330DP at 46, but he acknowledged that there was some authority supporting Haley’s position that attorneys acting pro se are not subject to the prohibition. DP at 46-47. Ultimately, in his “Additional Findings of Fact, Application of Standards, and Recommendation,” the hearing officer determined that, “because of the specific language of RPC 4.2 (i.e., Tn representing a client....’) and because of the apparent absence of authority within the state of Washington on this specific issue, Mr. Haley could have harbored a sincere belief that contacts with a represented opposing party were not prohibited.” DP at 63. Consequently, the hearing officer concluded that the violation was “negligent” and that the presumptive sanction was thus a reprimand. Id. (citing Am. Bar Ass’n, Standards for Imposing Lawyer Sanctions std. 6.33 (1991 & Supp. 1992) (ABA Standards)).
¶7 Deleting the hearing officer’s conclusion that Haley’s violation was negligent, the Board substituted its contrary determination that “Haley’s mental state was knowledge” and that the presumptive sanction was therefore a suspension. DP at 7 (citing ABA Standards std. 6.32). In doing so, the Board took note that Haley knew Highland was represented by counsel at all times and stated that a “reasonable reading of RPC 4.2 prohibits a lawyer, while representing him[self] or herself, from contacting a represented party.” DP at 7-8. The Board also faulted Haley for not “taking time to determine whether his conduct was an ethical violation.” DP at 8.
¶8 Count 3. In 1988, Haley and four other individuals formed Coresoft, a Washington corporation in the software development business. The four other shareholder/directors were Nicholas Corff, Donald Padleford, Randolph Cerf, and Bruce Haley. In addition to being a shareholder, board member, and secretary of Coresoft, Haley also served as the principal lawyer for the company.
¶9 In raising capital for Coresoft, the corporation obtained a $75,000 line of credit directly from Key Bank, which was personally guaranteed by the Coresoft shareholder/directors. This credit was properly secured with a *331security agreement and “UCC-1” financing statement, see chapter 62A.9A RCW, and, as a result, Key Bank maintained a first priority security interest in Coresoft’s assets. Additional capital was obtained in the form of $40,000 loaned to Coresoft by Haley in 1988, the funds for which Haley obtained via personal loan. Haley obtained a promissory note from Coresoft and a signed UCC-1 financing statement as part of the loan transaction. However, there was no separate security agreement securing the note, and the UCC-1 financing statement was not filed until October 1990.2 Haley’s purported security interest had second priority behind Key Bank’s interest.
f 10 In late 1990, the Coresoft board of directors came to realize that the company’s financial viability was hopeless. The board concluded that the best option was to form another corporation that would purchase Coresoft’s assets for an amount at least covering the $75,000 from Key Bank and, thereby, discharge all personal liability they had individually incurred by guaranteeing the line of credit. With the agreement or acquiescence of the board, Haley undertook the following course of action: (1) Haley formed a new corporation, known as Star Software, for the purpose of purchasing Coresoft’s assets, while leaving as many liabilities as possible behind;3 (2) Haley conducted a foreclosure sale on Coresoft’s assets, which he appeared to be in a position to do as a second priority security interest holder; and (3) acting as Star Software’s attorney, the only bidder *332at the sale, Haley purchased Coresoft’s assets for an amount that covered both Key Bank’s $75,000 and the $26,000 remaining due on Haley’s $40,000 loan to Coresoft. Coresoft became defunct on February 1, 1991.
¶11 Haley concedes that conflicts of interest arose out of this series of events. Specifically, Haley’s duty to Coresoft and its shareholders conflicted with his interests in recovering on his personal loan and in moving Coresoft’s assets to his new client, Star Software, at the lowest possible price. The hearing officer found that Haley made certain that Star Software took on only those assets and liabilities beneficial to the new company, including foreclosing on assets not covered by his UCC-1 financing statement. The hearing officer also found Haley’s actions harmful or potentially harmful to Coresoft and its shareholders. While the Coresoft board members agreed to the formation of Star Software and the foreclosure sale, Haley did not obtain an informed written consent from Coresoft before the sale to Star Software.4 The hearing officer concluded that Haley acted “with knowledge” and that the presumptive sanction for the violation was a suspension. DP at 64-66 (citing ABA Standards std. 4.32).
¶12 The Board adopted the hearing officer’s analysis of the presumptive sanction, but two members of the Board dissented, contending that Haley’s failure to obtain written consent was merely negligent and that a reprimand would be the appropriate presumptive sanction.
fl3 Recommended Sanctions for Counts 2 and 3. The hearing officer found three aggravating factors (prior disciplinary offense, multiple offenses, and substantial experience) and two mitigating factors (cooperative attitude and delay in the disciplinary proceedings). See ABA Standards stds. 9.22(a), (d), (i); 9.32(e), (j). The hearing officer recommended that Haley be reprimanded for the count 2 violation and suspended for 60 days for the count 3 violation. Having *333adopted the hearing officer’s aggravating and mitigating factors, the Board recommended a six-month suspension for each count, with the two suspensions to be served concurrently.
ISSUES
¶14 1. Does RPC 4.2(a) prohibit a lawyer who is acting pro se from contacting a party who is represented by counsel? If so, should the rule be applied in the present case?
¶15 2. What is the appropriate sanction for Haley’s violation of RPC 1.7?
ANALYSIS
¶16 Standard of Review. When a lawyer discipline decision by the Board is appealed, this court has “plenary authority” on review. In re Disciplinary Proceeding Against Whitt, 149 Wn.2d 707, 716, 72 P.3d 173 (2003). While we “do[ ] not lightly depart from the Board’s recommendation,” we are “not bound by it.” In re Disciplinary Proceeding Against Tasker, 141 Wn.2d 557, 565, 9 P.3d 822 (2000). The court reviews conclusions of law de novo. Whitt, 149 Wn.2d at 716-17. We have “the inherent power to promulgate rules of discipline, to interpret them, and to enforce them.” In re Disciplinary Proceeding Against Stroh, 97 Wn.2d 289, 294, 644 P.2d 1161 (1982) (emphasis added); see also ELC 2.1 (recognizing this court’s “inherent power to maintain appropriate standards of professional conduct”).
¶17 Applicability of RPC 4.2(a) to Lawyer Acting Pro Se. RPC 4.2(a) reads in full as follows:
In representing a client, a lawyer shall not communicate about the subject of the representation with a party the lawyer knows to be represented by another lawyer in the matter, unless the lawyer has the consent of the other lawyer or is authorized by law to do so.
*334The rule is virtually identical to model rule 4.2. See ABA, Annotated Model Rules of Professional Conduct rule 4.2 (5th ed. 2003) (ABA Annotated Model Rules). While we have not formally adopted the commentary to the ABA Annotated Model Rules, we have noted that it “may be ‘instructive in exploring the underlying policy of the rules.’ ” In re Disciplinary Proceeding Against Carmick, 146 Wn.2d 582, 595, 48 P.3d 311 (2002) (quoting State v. Hunsaker, 74 Wn. App. 38, 46, 873 P.2d 540 (1994)). As the comment to model rule 4.2 explains, the rule aims to protect those represented by counsel “against possible overreaching by other lawyers who are participating in the matter, interference by those lawyers with the client-lawyer relationship and the uncounselled disclosure of information relating to the representation.”5 In Carmick, we acknowledged that “[t]he rule’s purpose is to prevent situations in which a represented party is taken advantage of by adverse counsel.” 146 Wn.2d at 597 (citing Wright v. Group Health Hosp., 103 Wn.2d 192, 197, 691 P.2d 564 (1984)).
f 18 At issue in the present case is whether RPC 4.2(a) applies to lawyers acting pro se — or, more precisely, whether a lawyer who is representing himself or herself is, in the words of RPC 4.2(a), “representing a client.” This court has not previously addressed this issue; nor has the WSBA issued an ethics opinion, formal or informal, on the question. Other jurisdictions that have considered the rule’s applicability to lawyers acting pro se have generally concluded that the policies underlying the rule are better served by extending the restriction to lawyers acting pro se. See In re Segall, 117 Ill. 2d 1, 5-6, 509 N.E.2d 988, 109 Ill. Dec. 149 (1987); Comm. on Legal Ethics v. Simmons, 184 W. Va. 183, 185, 399 S.E.2d 894 (1990); Sandstrom v. Sandstrom, 880 P.2d 103, 108-09 (Wyo. 1994); Runsvold v. Idaho State Bar, 129 Idaho 419, 420-21, 925 P.2d 1118 *335(1996); Vickery v. Comm’n for Lawyer Discipline, 5 S.W.3d 241, 259 (Tex. Ct. App. 1999); In re Discipline of Schaefer, 117 Nev. 496, 507-08, 25 P.3d 191 (2001).
¶19 Haley asks this court to take the contrary view and hold that the plain meaning of the word “client” in RPC 4.2(a) precludes application of the rule to a lawyer acting pro se. The word “client” is variously defined as “[a] person or entity that employs a professional for advice or help in that professional’s line of work,” Black’s Law Dictionary 271 (8th ed. 2004), and “a person who engages the professional advice or services of another.” Webster’s Third New International Dictionary 422 (2002). Thus, for the rule to apply to lawyers acting pro se, such lawyers would, in effect, be employing or engaging themselves for advice, help, or services. This, as Haley contends, suggests that lawyers who are acting pro se are excluded from the scope of the rule because such lawyers have no client.
¶20 In the alternative, Haley maintains that, even if RPC 4.2(a) were construed to restrict pro se lawyers from contacting represented parties, we should conclude that the rule as applied to him, a lawyer proceeding pro se, was unconstitutionally vague, violating his constitutional due process rights. Such a resolution finds support in Schaefer, 117 Nev. 496. There, the Nevada State Supreme Court relied on the principle that “a statute or rule is impermis-sibly vague if it ‘either forbids or requires the doing of an act in terms so vague that men of common intelligence must necessarily guess at its meaning and differ as to its application.’ ” Id. at 511 (quoting Connally v. Gen. Constr. Co., 269 U.S. 385, 391, 46 S. Ct. 126, 70 L. Ed. 322 (1926)).6 The *336Schaefer court based its determination that Nevada’s Supreme Court Rule 182, a rule identical to RPC 4.2(a), was unconstitutionally vague on “the absence of clear guidance” from the Nevada State Supreme Court and on “the existence of conflicting authority from other jurisdictions.” 117 Nev. at 512; see State Bar of Tex. v. Tinning, 875 S.W.2d 403, 408 (Tex. App. 1994) (applying standard that “statute, rule, regulation, or order is fatally vague only when it exposes a potential actor to some risk or detriment without giving fair warning of the nature of the proscribed conduct”); see also In re Ruffalo, 390 U.S. 544, 552, 88 S. Ct. 1222, 20 L. Ed. 2d 117 (1968) (holding that, in state disbarment proceeding, “absence of fair notice as to the reach of the grievance procedure” violated attorney’s due process rights).
¶21 Both factors relied on in Schaefer are present here. First, as noted above, no prior opinion of this court has addressed the application of RPC 4.2(a) to lawyers proceeding pro se. Second, in late 1996 and early 1997 when Haley contacted Highland, authority permitting such contacts counterbalanced the prohibitions then existing from four jurisdictions. See Segall, 117 Ill. 2d at 5-6; Simmons, 184 W. Va. at 185; Sandstrom, 880 P.2d at 108-09; Runsvold, 129 Idaho at 420-21.7 The comment to rule 2-100 of the California RPCs, a rule identical to RPC 4.2(a) in all material respects, explicitly permits a lawyer proceeding pro se to contact a represented party:
[T]he rule does not prohibit a [lawyer] who is also a party to a legal matter from directly or indirectly communicating on his or her own behalf with a represented party. Such a member has independent rights as a party which should not be abrogated because of his or her professional status. To prevent any possible abuse in such situations, the counsel for the opposing party may advise that party (1) about the risks and benefits of communications with a lawyer-party, and (2) not to accept or engage in communications with the lawyer-party.
*337Cal. RPC 2-100 discussion f 2. Likewise, a comment to the restatement specifically provides that “[a] lawyer representing his or her own interests pro se may communicate with an opposing represented nonclient on the same basis as other principals.” Restatement (Third) of the Law: The Law Governing Lawyers § 99 cmt. e at 73 (2000).
¶22 Alongside these explicit statements permitting the questioned contact, other authorities supported a reasonable inference that our RPC 4.2(a) did not foreclose a pro se lawyer’s communication with a represented opposing party. For example, the comparable rule in Oregon, DR 7-104(A)(1), put lawyers acting pro se squarely within the rule’s ambit:
(A) During the course of the lawyer’s representation of a client, a lawyer shall not:
(1) Communicate or cause another to communicate . . . with a person the lawyer knows to be represented by a lawyer .... This prohibition includes a lawyer representing the lawyer’s own interests.[8]
The absence of an explicit prohibition in RPC 4.2(a) could have suggested that Washington’s rule was narrower in scope than Oregon’s and did not apply to lawyers acting pro se. Additionally, the commentary to model rule 4.2 includes the statement that “[p]arties to a matter may communicate directly with each other.” ABA Annotated Model Rules rule 4.2 cmt. 4, at 417. Unlike the commentary to the restatement and to California’s RPC 2-100, this comment does not pointedly refer to a lawyer-party acting pro se; consequently, the breadth of the statement permits an inference that all parties may communicate unreservedly with each other. Finally, the holding in Pinsky v. Statewide Grievance Committee, 216 Conn. 228, 578 A.2d 1075 (1990), appears to call into question the policy concerns supporting the appli*338cation of RPC 4.2(a) to lawyers acting pro se. In Pinsky, the Connecticut State Supreme Court concluded that a represented lawyer-party had not violated an identical version of RPC 4.2(a) when he directly contacted his landlord, who was also represented by counsel, during an eviction matter. The Pinsky court took note that “[cjontact between litigants ... is specifically authorized by the comments under rule 4.2” and concluded that Pinsky was not “ ‘representing a client’ ” as stated in the rule. Id. at 236. The Pinsky court thus determined that communication between a represented lawyer-party and a represented nonlawyer party did not conflict with a key purpose of RPC 4.2(a) — the protection of a represented nonlawyer party from “possible overreaching by other lawyers who are participating in the matter.” ABA Annotated Model Rules rule 4.2 cmt. 1, at 417. Because the Pinsky decision did not address why contacts from a lawyer acting pro se would pose a greater threat of overreaching than would contacts from a represented lawyer-party,9 Pinsky provides further equivocal authority on the application of RPC 4.2(a) to lawyers acting pro se.
¶23 In sum, consistent with the resolution of the same issue in Schaefer, we hold that a lawyer acting pro se is “representing a client” for purposes of RPC 4.2(a), but given the absence of a prior decision from this court, along with the presence of conflicting or equivocal authority from other jurisdictions and legal commentaries, we find the rule impermissibly vague as to its applicability to pro se attorneys and thus apply our interpretation of the rule prospectively only.10 We therefore dismiss the violation alleged in *339count 2. We need not reach Haley’s alternative contention that the application of RPC 4.2(a) to his communications with Highland violated his free speech rights.
¶24 Sanction Analysis for Violation of RPC 1.7. Our court has determined that the ABA Standards should guide our determination of appropriate sanctions in bar disciplinary cases. In re Disciplinary Proceeding Against Johnson, 114 Wn.2d 737, 745, 790 P.2d 1227 (1990); In re Disciplinary Proceeding Against Halverson, 140 Wn.2d 475, 492, 998 P.2d 833 (2000). Under the ABA Standards, after misconduct is found, the court performs a two-part analysis. Halverson, 140 Wn.2d at 492-93. First, the court determines the presumptive sanction based on the ethical duty violated, the attorneys mental state, and the extent of actual or potential harm caused by the conduct. Id. Second, the court considers aggravating and mitigating factors, which may alter the presumptive sanction or decrease or lengthen a suspension. Id. at 496; see ABA Standards stds. 9.22, 9.32. The court will generally adopt the Board’s recommended sanction unless the sanction departs significantly from sanctions imposed in other cases or the Board was not unanimous in its decision. See In re Disciplinary Proceeding Against Kuvara, 149 Wn.2d 237, 259, 66 P.3d 1057 (2003) (holding that the court would “retain the Noble factors of proportionality and degree of unanimity, but discard the remaining three as redundant due to the existence of similar provisions in the Standards and the ELC”); In re Disciplinary Proceeding Against Noble, 100 Wn.2d 88, 95-96, 667 P.2d 608 (1983) (identifying five factors to be considered in determining appropriate sanction).
¶25 The determination of the presumptive sanction is straightforward. Haley concedes that his dual representation of Coresoft and Star Software was prohibited by RPC 1.7(a) and his representation of Coresoft was materially limited under RPC 1.7(b) by his own interest in *340foreclosing on his security interest and transferring Coresoft’s assets to Star Software. Therefore, we look to the presumptive sanctions for conflict of interest violations under RPC 1.7.
Suspension is generally appropriate when a lawyer knows of a conflict of interest and does not fully disclose to a client the possible effect of that conflict, and causes injury or potential injury to a client.
Reprimand is generally appropriate when a lawyer is negligent in determining whether the representation of a client may be materially affected by the lawyer’s own interests, or whether the representation will adversely affect another client, and causes injury or potential injury to a client.
ABA Standards stds. 4.32, 4.33 (emphasis added). As to Haley’s mental state, the hearing officer concluded that Haley “could not have reasonably believed that the representation of his own interests as a secured party (if, indeed, he was a secured party) or that his role as lawyer for, officer of, and shareholder of Star Software were not directly adverse to, or materially limited by his responsibilities to Coresoft.” DP at 47. Haley offers no argument that he failed to recognize that the conflicts of interest existed, and the conclusion by the Board and hearing officer that Haley knew there was a conflict is well supported by the record. In particular, Haley went to members of Coresoft’s board of directors for oral authorization regarding some of his actions. It is also undisputed that Haley’s actions created the potential for harm to Coresoft and its shareholders/directors. Consequently, Haley is subject to standard 4.32, which makes suspension the presumptive sanction when a lawyer knows of a conflict and causes potential injury to a client.11
*341¶26 Having determined that suspension is the presumptive sanction under the ABA Standards, we next turn to the aggravating and mitigating factors under standards 9.22 and 9.32. The hearing officer determined that three aggravating factors were present: a prior disciplinary offense, multiple offenses, and substantial experience in practice. See ABA Standards stds. 9.22(a), (d), (i). The hearing officer identified as mitigating factors Haley’s cooperative attitude and the substantial delay in the proceedings. See id. at stds. 9.32(e), (j).
¶27 As an initial matter, we note that the “prior disciplinary offense” aggravating factor is no longer present given our resolution of the RPC 4.2(a) issue. In finding that Haley had a prior disciplinary offense, the hearing examiner relied on an unrelated violation of RPC 4.2(a) for which Haley was censured in 1999. The conduct underlying that violation occurred in March 1996, and the subsequent grievance was filed sometime before May 10, 1996, when it was reported to Haley. See Ex. 27. Conversely, the findings of fact indicate that Highland’s grievance against Haley relating to the violation of RPC 1.7 could not have been made to the WSBA earlier than July 1996. See DP at 68 (noting the two grievances leading to this matter were filed in July 1996 and February 1997). We have previously held that an after-the-fact offense operates as a prior offense for aggravating factor purposes as long as the lawyer knew he or she was under investigation for the older offense when committing the more recent offense. Brothers, 149 Wn.2d at 586. However, that holding has no application in this case because nothing in the record suggests that Haley was under investigation for the RPC 1.7 violation when the so-called “prior offense” (Haley’s March 1996 violation of RPC 4.2) occurred. As a result, we are left to consider only the two remaining mitigating and aggravating factors.
f 28 The mitigating factors present in this case, in particular the delay in the disciplinary proceedings, are significant enough to justify altering the presumptive sanction. In Tasker, this court found the delay in prosecution “so substantial” and “so compelling” as to reduce the presump*342tive sanction from disbarment to a two-year suspension. 141 Wn.2d at 570. Tasker’s violations occurred and began to be investigated by the WSBA in 1993-1994. Id. at 561-62. However, the WSBA’s formal complaint against Tasker was not filed until February 1998. Id. at 562. In relying on delay as the factor tipping the balance toward suspension, the court recognized that Tasker did not cause the delay, that he was subject to the opprobrium of his legal community in the interim, and that the delay resulted from understaffing and slack prosecution by the WSBA. Id. at 568. Here, Haley’s violation of RPC 1.7 occurred in 1990-1991 but was not reported to the WSBA until July 1996. The formal complaint was not filed until November 21, 2000. Thus, the delay between the grievances and formal complaint in both Tasker and this case spanned approximately four years. We must also take note that the substantial delay between Haley’s violations and the grievance have now resulted in a near 15-year delay in resolving this case, which weighs heavily in favor of altering the presumptive sanction.12
¶29 In contrast to the substantial delay factor, the two remaining aggravating factors are relatively insignificant in this case. First, the “substantial experience in practice” aggravating factor is not marked by an exceedingly long period of prior practice. Haley became a member of the Washington bar in 1979 and began practicing law in 1982. Thus, at the time of the violation of RPC 1.7, Haley had been in practice approximately 8 to 10 years. Second, the “multiple offenses” aggravating factor is largely obviated by our holding that Haley did not violate RPC 4.2(a). Instead, we are left only with the hearing officer’s finding that “each count itself reflects multiple events constituting misconduct.” DP at 67. While Haley’s violation of RPC 1.7(a) and (b) occurred more than once during his representation of Coresoft between 1988 and 1991, we cannot *343conclude that this fact weighs strongly against altering the presumptive sanction.
¶30 After establishing the presumptive sanction and weighing the mitigating and aggravating factors, we consider whether, in light of the two remaining Noble factors of proportionality and Board unanimity, the Board’s recommendation should be altered. Kuvara, 149 Wn.2d at 259; Noble, 100 Wn.2d at 95-96. We are not persuaded that a downward departure from the presumptive sanction of suspension would be disproportionate under these circumstances. As to unanimity, the Board was split as to the RPC 1.7 violation, with an 11-member majority recommending suspension and 2 dissenting members recommending reprimand. In considering the unanimity of the Board, we give less deference to the decision of a divided board. Whitt, 149 Wn.2d at 723. Although the division was not especially marked in this case, the lack of unanimity supports altering the presumptive sanction from suspension to reprimand. In sum, the substantial weight of the mitigating factors over the aggravating factors, along with the considerations required by the two Noble factors, leads us to conclude that reprimand rather than suspension, is the appropriate sanction for Haley’s violation of RPC 1.7.
CONCLUSION
¶31 We hold that RPC 4.2(a) prohibits a lawyer who is representing his own interests in a matter from contacting another party whom he knows to be represented by counsel. However, because we conclude that RPC 4.2(a) was imper-missibly vague as applied to Haley, we apply our interpretation of RPC 4.2(a) prospectively only and thus dismiss count 2 in the complaint. We further conclude that, although the presumptive sanction for Haley’s knowing violation of RPC 1.7 is suspension, the mitigating factors, in particular the extensive delay in both reporting and prosecution, demand a more lenient sanction. We therefore depart from the Board’s recommendation of a six-month *344suspension and impose a reprimand for Haley’s violation of RPC 1.7.
C. Johnson, Bridge, Chambers, and J.M. Johnson, JJ., concur.
The WSBA’s motion to strike the appendix attached to Haley’s brief is granted pursuant to RAP 10.3(a)(7), but the motion for terms of $500 is denied. Haley’s motion to file additional briefing and submit a declaration of authenticity by Nicholas Corff is denied. Notably, the substance of the materials disputed in these motions is not germane to our resolution of the issues in this case.
Under the Uniform Commercial Code, as adopted in Washington, a security interest in collateral becomes enforceable when “[t]he debtor has authenticated a security agreement that provides a description of the collateral.” RCW 62A.9A--203(b)(3)(A). Perfection of a security interest (i.e., acquiring priority over unperfected security interests and lienholders under RCW 62A.9A-317) generally requires filing a UCC-1 financing statement. RCW 62A.9A-310(a). Given these rules, the absence of a separate security agreement and Haley’s failure to file the UCC-1 financing statement until Coresoft was failing may have allowed Coresoft to void his security interest; thus, Coresoft and its shareholders might have been in an economic position that was potentially more favorable than they were aware of.
Of the original Coresoft shareholders, only Haley and his brother Bruce became shareholders in Star Software. The other Coresoft shareholders declined Haléis invitation to invest in the new company.
None of Coresoft’s shareholder/directors are complaining parties in this disciplinary matter. The grievance was filed by Highland after Haley initiated the litigation described in count 2.
ABA Annotated Model Rules rule 4.2 cmt. 1, at 417. The annotation to model rule 4.2 summarizes that “Rule 4.2 preserves the lawyer-client relationship, protects clients against overreaching by other lawyers, and reduces the likelihood that clients will disclose confidential or damaging information.” Id. at 418 (citing ABA Comm, on Ethics and Prof’1 Responsibility, Formal Ethics Op. 95-396 (1995)).
The dissent recalls that in Haley v. Medical Disciplinary Board, 117 Wn.2d 720, 818 P.2d 1062 (1991), we cited Connally but nevertheless “affirmed sanctions against a physician for violating a statute prohibiting ‘ “moral turpitude” ’ although we recognized ‘uncertainties associated with’ the statutory language in question.” Dissent at 353 (quoting Haley, 117 Wn.2d at 740). The dissent fails to acknowledge, however, that more recently in In re Disciplinary Proceeding Against Halverson, 140 Wn.2d 475, 998 P.2d 833 (2000), this court distinguished Haley and declined to find a violation of RLD 1.1 (“Commission of Act of Moral Turpitude”) because “a bright-line rule prohibiting attorney-client sexual relations [did] not exist.” Id. at 491-92.
Looking no further than these four cases, the dissent ignores the counterbalancing authority found in rules, commentaries, and case law from other jurisdictions. Dissent at 352.
In re Conduct of Smith, 318 Or. 47, 49 n.1, 861 P.2d 1013 (1993) (emphasis added) (quoting DR 7-104(A)(1)). Oregon’s RPC 4.2 (adopted effective Jan. 1,2005) likewise makes explicit that the prohibition applies to lawyers acting pro se: “In representing a client or the lawyer’s own interests, a lawyer shall not communicate . .. with a person the lawyer knows to be represented by a lawyer .. ..” (Emphasis added.)
That a lawyer-party seeks representation may at least suggest that he or she does not have “the superior knowledge and skill of the opposing lawyer” in the subject of the litigation, a circumstance that would arguably diminish the risk of overreaching in the represented lawyer-party’s contacts with other represented parties. Pinsky, 216 Conn, at 236.
We join the dissent’s rejection of “the position taken by Justice Sanders in his concurring opinion that attorney discipline is a punishment scheme and therefore is subject to the rule of lenity — a criminal law doctrine.” Dissent at 354. As we stated in In re Disciplinary Proceeding Against Noble, 100 Wn.2d 88, 667 P.2d 608 (1983), “because we are committed to the proposition that discipline is not *339imposed as punishment for the misconduct, then our primary concern is with protecting the public and deterring other lawyers from similar misconduct.” Id. at 95.
Haley does contend that the Board erred in concluding that his violation of RPC 1.7 was done knowingly, suggesting that he was merely negligent in failing to obtain written consent rather than oral consent. This argument is without merit. There is no intent element related to obtaining informed written consent, which either exists or does not. If written consent does exist, there is simply no violation of the RPCs, and the ARA Standards for imposing discipline are inapplicable.
Haley agreed not to present argument regarding the “substantial delay” factor in consideration for an extension of time before review by the Board. Clerk’s Papers at 371. However, substantial delay is an unchallenged finding by the hearing officer, and this court remains free to consider its effect.