*1003Plaintiff Stephen Bushansky filed a shareholder derivative action in San Diego Superior Court on behalf of nominal defendant NantKwest, Inc. Based on a forum selection provision contained in NantKwest's certificate of incorporation that generally designates Delaware as the forum for shareholder derivative actions, the trial court dismissed Bushansky's suit.
On appeal, Bushansky argues that the forum selection provision was never triggered since a condition precedent to its operation was never met. That condition requires that Delaware courts have personal jurisdiction over all indispensable parties named as defendants. Since Delaware courts lacked jurisdiction over one of the defendants at the time the action was filed in California, Bushansky urges that the condition was not met and, thus, the forum selection provision was not triggered.
The provision, however, does not specify that personal jurisdiction must be determined as of the date an action is filed and no later. In fact, it is silent as to when personal jurisdiction in Delaware must exist. Faced with that silence, we-in accord with a well-established principle of contract law-presume that the parties intended a reasonable timeframe for the condition to be fulfilled. As we shall explain, here the condition was satisfied within a reasonable amount of time. Accordingly, dismissal based on the forum selection clause was proper.
FACTUAL AND PROCEDURAL BACKGROUND
Bushansky filed a shareholder derivative action in San Diego Superior Court on behalf of nominal defendant NantKwest, a Delaware corporation *1004headquartered in California. The complaint alleged causes of action against NantKwest's directors and officers for breaches of fiduciary duty. It also alleged a malpractice claim and aiding/abetting claim against Mayer Hoffman McCann PC (the Auditor), an accounting firm that served as NantKwest's auditor. The Auditor is a Missouri professional corporation with offices in California.
NantKwest moved to dismiss the suit based on forum non conveniens, arguing that a forum selection provision in its certificate of incorporation mandated dismissal. ( Code Civ. Proc., §§ 410.30, 418.10.) The provision states, in relevant part:
"Unless the Corporation consents in writing to the selection of an alternative forum and to the fullest extent permitted by law, the Court of Chancery of the State of Delaware (or, if such court lacks jurisdiction, any other state or federal court located within the State of Delaware)
*57shall be the sole and exclusive forum for ... any derivative action or proceeding brought on behalf of the Corporation ...; in all cases subject to the court's having personal jurisdiction over the indispensable parties named as defendants ." (Italics added.)
The Auditor joined NantKwest's motion to dismiss and demurred. All the other defendants demurred too. The Auditor's demurrer specified that "for this derivative action, [it] consents to venue in the Delaware Court of Chancery."
In opposition to NantKwest's motion to dismiss, Bushansky argued that the final clause of the forum selection provision-"in all cases subject to the court's having personal jurisdiction over the indispensable parties named as defendants"-was not met. It was (and is) undisputed that there was no personal jurisdiction over the Auditor in Delaware when the suit was filed in California.
The trial court rejected Bushansky's arguments and granted the motion to dismiss. Characterizing the forum selection clause as mandatory and not permissive, it reasoned that the Auditor's later consent to jurisdiction in Delaware satisfied the provision. The court further concluded that even if the clause was not triggered by the Auditor's postfiling consent, Bushansky could not take advantage of that fact since he "deprived [the Auditor] of the opportunity to consent to jurisdiction at the outset" by failing to "present a litigation demand on [NantKwest's] Board." (See *10051 Witkin, Summary of Cal. Law (11th ed.) Contracts § 846, p. 897 ["A person cannot take advantage of his or her own act or omission to escape liability; if the person prevents or makes impossible the performance or happening of a condition precedent, the condition is excused"].) It deemed the pending demurrers moot given its ruling on the motion to dismiss.
DISCUSSION
In this appeal, we must determine whether dismissal was warranted in light of the forum selection clause contained in NantKwest's certificate of incorporation. We conclude it was.
1. Background Principles and Standard of Review
The parties spend considerable time and space debating who has what burden on the crucial issue in this case. We therefore review the applicable principles.
The parties agree that NantKwest's certificate of incorporation constitutes a contractual agreement between the corporation and its shareholders. (See Airgas, Inc. v. Air Products & Chemicals, Inc. (Del. 2010)
Defendants rely heavily on case law suggesting that where a "mandatory" forum selection clause is involved, the party opposing enforcement of the clause bears the burden of proof. ( Cal-State Business Products & Services, Inc. v. Ricoh (1993)
Relying on Cal-State , supra ,
*592. The Provision Was Triggered
With those background principles in mind, we turn to interpretation of the forum selection provision in this case. Central to this appeal is its final clause: "in all cases subject to the court's having personal jurisdiction over all indispensable parties named as defendants."
As a threshold matter, we observe that the parties-at least in certain parts of their briefing-seem to agree that Delaware law governs the interpretation of NantKwest's certificate of incorporation. Yet they also cite law from a multitude of other jurisdictions, and defendants at one point even assert that California law militates in favor of a particular interpretation of the certificate. For the sake of clarity, we note that as a California court we generally *1007apply California law except to the extent there is a conflict, in which case Delaware law governs the interpretation. ( Hurtado v. Superior Court (1974)
Turning to the language of the provision, we agree with Bushansky that the final clause's use of "subject to" indicates it is a condition precedent to Delaware courts being "the sole and exclusive forum" for derivative actions. "A condition precedent is either an act of a party that must be performed or a certain event that must happen before a contractual right accrues or a contractual duty arises." ( 13 Williston on Contracts (4th ed.) § 38:7.) And, "the words 'subject to' in a contract usually indicate a condition to one party's duty of performance and not a promise by another." ( 13 Williston on Contracts (4th ed.) § 38:16 ; accord, Rubin v. Fuchs (1969)
Yet concluding that the final clause is a condition precedent to Delaware's status as the "sole and exclusive forum" does not end our inquiry. The clause does not, in plain language, state when the Delaware courts must "hav[e] personal jurisdiction." Thus, simply put, the question before us is: When does personal jurisdiction over all indispensable parties have to exist?
Bushansky asserts that it must exist at the time the action is filed. He contends such a time limitation is inherent in the term "personal jurisdiction," since jurisdiction is normally "determined at the time of filing." This argument, while in some respects appealing, suffers a fatal flaw. It primarily contemplates establishing personal jurisdiction through the traditional minimum contacts analysis. (See, e.g., MacQueen v. Union Carbide Corporation (D. Del. Dec. 3, 2014, Civ. Action No. 13-831-SLR-CJB),
Accordingly, we are left with the conclusion that the contract is silent as to the time in which the condition must be fulfilled. In light of that silence, we "apply the rule that where no time is fixed for the performance of a condition precedent, it will be presumed that it is to be performed within a reasonable time." ( Gluckman v. Holzman (Del. Ch. 1947)
In our view, a reasonable time for satisfaction of this condition does not end when the suit is filed. Such would essentially rewrite the clause to include a very specific hard and fast deadline where there is none. Not to mention that because defendants do not generally receive notice of a lawsuit until after it is filed, in most every case it would effectively obviate the possibility of triggering the clause through consent-based personal jurisdiction. That would not be reasonable.
Moreover, we note that we do not tread entirely new ground in concluding that a forum selection clause may be triggered by postfiling activity. For example, other jurisdictions have recognized that defenses raised during a suit may implicate a contractual forum selection clause. (See General Protecht Group, Inc. v. Leviton Mfg. Co., Inc. (Fed. Cir. 2011)
Of course, at some point, postfiling consent may simply be too late to trigger this clause. While we decline today to draw an arbitrary line as to when that would be, we caution that this opinion should not be read as an endorsement of unwarranted and unfair gamesmanship through a tactically timed consent to personal jurisdiction. In other words, we recognize that a defendant in a position like the Auditor's might well be tempted to withhold *1009its consent to Delaware jurisdiction until it deems it tactically advantageous to trigger the forum selection clause. We have little doubt that such gamesmanship would be outside the bounds of a reasonable timeframe.
Today, however, we need not decide this clause's outer temporal limit. It is sufficient to say that the Auditor's consent came within a reasonable time to satisfy the condition.
We recognize that our conclusion parts ways with an unpublished appellate case from Washington upon which Bushansky relies heavily: Shatas v. Snyder (Wash.Ct.App. Oct. 17, 2016, No. 73716-3-I),
On appeal, the plaintiff successfully argued "that the trial court misapplied the law when it concluded that [a defendant's] postfiling willingness to consent to Delaware jurisdiction was sufficient to establish personal jurisdiction." ( Shatas , supra ,
Bushansky contends that, given its factual similarity, Shatas is "highly persuasive authority." However, two particular aspects of Shatas cause us concern. First of all, the case is unpublished. Although citation of "unpublished opinions from other jurisdictions for their persuasive value does not violate" the California Rules of Court ( Apple Inc. v. Superior Court (2017)
More importantly, however, we question the logic underlying Shatas 's conclusion that postfiling consent is irrelevant. Shatas rejected arguments seemingly similar to NantKwest's on the basis that postfiling consent could not "invalidate properly invoked jurisdiction," presumably referring to the jurisdiction already invoked in Washington. ( Shatas , supra ,
3. The Provision Is Mandatory
Bushansky also argues that the clause in this case is permissive, not mandatory, and thus-even if applicable-requires us to engage in a traditional forum non conveniens analysis. (See Animal Film , supra ,
The order is affirmed. Defendants shall recover costs on appeal.
WE CONCUR:
BENKE, Acting P.J.
AARON, J.
Notes
No party to this action asserted that there was jurisdiction over the Auditor in Delaware when the California suit was filed or that the Auditor was not an indispensable party.
"Forum non conveniens is an equitable doctrine, codified in Code of Civil Procedure section 410.30, under which a trial court has discretion to stay or dismiss a transitory cause of action that it believes may be more appropriately and justly tried elsewhere." (Animal Film, LLC v. D.E.J. Productions, Inc. (2011)
Defendants' assertion that "[a] substantial-evidence standard of review applies where there is a forum-selection provision" is ill-advised for another reason. "There is a split of authority regarding the appropriate standard of review on whether a forum selection clause should be enforced through a motion to dismiss for forum non conveniens." (Quanta Computer Inc. v. Japan Communications Inc. (2018)
We recognize that " '[w]hat constitutes a reasonable time is a question of fact, depending upon the situation of the parties, the nature of the transaction, and the facts of the particular case.' " (Wagner , supra ,
See Central States, Southeast & Southwest Areas Pension Fund v. Phencorp Reinsurance Co. (7th Cir. 2006)
In light of this conclusion, we do not reach defendants' alternative argument that the condition should be excused because Bushansky prevented the Auditor from consenting before the suit was filed. Nor do we reach their other argument regarding Bushansky's purported failure to establish that the Auditor was an indispensable party within the meaning of the clause.
"[I]f there is a mandatory forum selection clause, the test is simply whether application of the clause is unfair or unreasonable, and the clause is usually given effect." (Berg , supra ,
