OPINION
Opinion by
In this combined original proceeding and interlocutory appeal, Nabors Drilling USA, LP; Ray Vasquez; and David Reth-aber seek relief from the trial court’s failure to compel arbitration on the sole ground the arbitration agreement failed to call for “binding” arbitration. In response, real party in interest Jimmy Carpenter contends arbitration was properly denied because Nabors failed to “prove up” the arbitration agreement, and any such agreement is unenforceable. We dismiss Nabors’s related interlocutory appeal for lack of jurisdiction, and conditionally grant mandamus relief.
Background
The underlying action arises from a dispute between Jimmy Carpenter and his former employer, Nabors Drilling, and former co-workers, Vasquez and Rethaber. When Carpenter was hired to work in Nabors’s Jim Wells County operations in 2003, he was given a copy of a document entitled “Nabors Dispute Resolution Program and Rules.” The “Resolution Program” established a procedure for resolving disputes arising from the employer-employee relationship through the use of arbitration. Carpenter signed a form acknowledging he had received a copy of the Resolution Program.
In March 2005, Carpenter left his job at Nabors. Subsequently, Carpenter sued Nabors, Vasquez, and Rethaber, alleging he was forced to resign from his position at Nabors because of repeated physical and verbal assaults by Vasquez and Retha-ber. Carpenter’s suit raised various claims against Nabors, including Texas Labor Code violations, a hostile work environment, sexual discrimination, intentional infliction of emotional distress, and assault. Nabors, Vasquez, and Rethaber answered the suit, then moved to compel arbitration of all claims. Two exhibits were attached to the motion to compel: a copy of the Resolution Program and Carpenter’s signed acknowledgment. In his written response to the motion to compel, Carpenter argued the Resolution Program was unenforceable due to: (1) a failure of consideration; (2) a lack of clarity as to whether the parties agreed to mediation or arbitration; and (3) his signed acknowledgment’s failure to indicate if arbitration or mediation was binding. Carpenter’s response did not controvert the exhibits attached to Nabors’s motion to compel.
*245 The trial court held a non-evidentiary hearing. Nabors argued the parties had a valid arbitration agreement and that Carpenter’s claims fell within the scope of the agreement. Carpenter did not deny the existence of a written arbitration policy or dispute his claims fell within the scope of the Resolution Program. 2 Nor did he dispute he received notice of the arbitration policy. Instead, Carpenter argued the Resolution Program was unenforceable because: (1) Nabors failed to meet its “initial burden” of presenting an arbitration agreement; (2) the arbitration agreement was illusory and unenforceable because Nabors could terminate or modify it with ten-days notice to the employee; and (3) the agreement was ambiguous because it called for both mediation and arbitration. The trial court expressly rejected Carpenter’s first two arguments; however, it concluded the Resolution Program did not call for “binding” arbitration, 3 and therefore, denied the motion to compel arbitration.
The trial court’s order does not state if the arbitration agreement in this case is governed by the Federal Arbitration Act (“FAA”) or the Texas Arbitration Act (“TAA”). Therefore, the relators/appel-lants seek review of the order denying arbitration both by mandamus and interlocutory appeal.
See Jack B. Anglin Co., Inc. v. Tipps,
Mandamus JuRisdiction
We must first determine if the trial court’s order refusing to compel arbitration is subject to review by interlocutory appeal or by mandamus. A trial court’s order denying a motion to compel arbitration, if based on the TAA, is reviewable by interlocutory appeal.
See
Tex. Civ. PRac.
&
Rem.Code Ann. § 171.098(a)(1) (Vernon 2005). However, if based on the FAA, an order denying a motion to compel arbitration must be reviewed by mandamus.
EZ Pawn Corp. v. Mandas,
The FAA applies when a contract relates to interstate commerce.
Tipps,
In this case, it is undisputed that Nabors is a Delaware limited partnership with operations in several states, including Texas. Additionally, the Resolution Program ex
*246
pressly invokes the FAA. As such, we hold that the FAA applies, and mandamus is the proper mechanism for reviewing the trial court’s order refusing to compel arbitration.
In re FirstMerit Bank, N.A.,
STANDARD OP REVIEW
Mandamus will issue only to correct a clear abuse of discretion for which the remedy by appeal is inadequate.
Walker v. Packer,
A party seeking to compel arbitration by a writ of mandamus must: (1) establish the existence of a valid agreement to arbitrate under the FAA, and (2) show that the claims in dispute are within the scope of the agreement.
In re Kellogg Brown & Root, Inc.,
Evidentiary Objection
A trial court may summarily decide whether to compel arbitration on the basis of affidavits, pleadings, discovery, and stipulations.
Tipps,
Carpenter argues mandamus relief should be denied because Nabors failed to verify or “properly prove up” the Resolution Program and Carpenter’s acknowledgment, which were attached as exhibits to its motion to compel. However, Carpenter’s written response did not controvert or raise any objection to Nabors’s exhibits. Instead, Carpenter asked the trial court to “take judicial notice of the Court’s file and
the evidence
presented as part of Defendants’ motion.... ” (emphasis supplied). Based on the pleadings before it, the trial court was not required to conduct an evidentiary hearing and properly
*247
considered Nabors’s summary proof.
See In re Conseco Finance Serv. Corp.,
Unambiguous AgReement to ARbitrate
Relators argue the trial court should have compelled arbitration because the clear language of the Resolution Program, when read as a whole, requires the parties to arbitrate Carpenter’s claims. We agree.
Arbitration agreements are interpreted under contract principles.
In re C.A.K.,
Here, the Resolution Program expressly states it “is intended to create an exclusive procedural mechanism for the final resolution of all Disputes falling within its terms,” that “[p]roceedings under the Program shall be the exclusive, final and binding method by which Disputes are resolved,” and that “[a]ll Disputes not otherwise settled by the Parties shall be finally and conclusively resolved under this Program and the Rules.” The Resolution Program’s detailed “Rules” establish procedures for initiating arbitration and appointing an arbitrator and fully address hearings, discovery, representation, the record, evidence, post-hearing submissions, and the closing of the arbitration proceedings. Significantly, the Resolution Program authorizes a trial court to enter a judgment on the arbitrator’s award; “Parties to these Rules shall be deemed to have consented that judgment upon the award of the arbitrator may be entered and enforced in any federal or state court having jurisdiction of the Parties.” 5
Turning to the mediation language in the Resolution Program, we conclude it does not render the agreement to *248 arbitrate ambiguous. The relevant provision provides: “At any time before the proceeding is closed, the Parties may agree to mediate their dispute by notifying AAA [American Arbitration Association], or JAMS [Judicial Arbitration and Mediation Services]. AAA or JAMS shall determine what procedures apply to any such mediation.” This language is susceptible to only one reasonable interpretation: Carpenter’s disputes must be arbitrated, unless the parties agree to mediation and notify the designated organization in a timely manner. We further conclude Carpenter’s acknowledgment, which includes a reference to mediation, does not alter the clarity of the Resolution Program. 6 Considering the instrument as a whole, the Resolution Program requires the arbitration of Carpenter’s disputes in clear and definite language. Accordingly, the trial court erred in not enforcing arbitration on the ground the Resolution Program did not call for “binding” arbitration.
Although we have determined the trial court erred in denying arbitration based on one ground, our analysis does not stop here. An order denying arbitration must be upheld if it is proper on any of the grounds considered by the trial court.
See In re H.E. Butt Grocery Co.,
FaxlüRe of Consideration
Carpenter also argued the Resolution Program was unenforceable because the promise to arbitrate was not supported by consideration. In making this argument, Carpenter pointed to provisions in the Resolution Program that allow Nabors to amend or to terminate the arbitration agreement. 7 The trial court expressly overruled this ground at the hearing on the motion to compel.
The Texas Supreme Court has rejected this argument under similar circumstances.
See In re Halliburton,
GROUNDS Not Raised Below
In his response to the mandamus petition, Carpenter argues for the first time that there are “disputed question[s] of fact” concerning notice and acceptance of the Resolution Program. We disagree. The FAA does not require an arbitration agreement to be signed if it is in writing and agreed to by the parties.
In re AdvancePCS Health L.P.,
Also, Carpenter did not controvert Na-bors’s summary proof concerning notice and acceptance of the arbitration policy, and therefore, failed to raise a material fact issue as to notice or acceptance.
See Tipps,
Conclusion
When a court concludes claims are within the scope of an arbitration agreement and no defense to enforcing the agreement is established, it has no discretion but to compel arbitration.
In re FirstMerit Bank, N.A.,
Notes
. The Resolution Program broadly defines the disputes covered to include: "matter[s] related to or concerning the relationship between the Employee and the Company including, by way of example and without limitation, allegations of: discrimination based on race, sex, religion, national origin, age, veteran status or disability; sexual or other kinds of harassment; workers' compensation retaliation; defamation; infliction of emotional distress .... ”
. During the hearing and immediately prior to ruling the trial court stated: "I think the third argument is the one I'm having problems with, is finding some sort of unambiguous language in this — this policy that says that these disputes shall be submitted to an arbitrator and that arbitrator’s decision shall be binding.”
. Notwithstanding the trial court's concerns, the issue of whether the FAA applies only to “binding” arbitration agreements has not been settled by the Texas courts or the federal courts.
See Dluhos v. Strasberg,
. A court may enter judgment under the FAA only if the parties agree that a court may enter judgment.
See
9 U.S.C. § 9;
Porter & Clements,
. In advancing his ambiguity argument, Carpenter relied on the following language in his acknowledgment: "By my signature below, I acknowledge and understand that I am required to adhere to the Dispute Resolution Program and its requirement for submission of disputes to a process that may include mediation and/or arbitration.”
. The relevant provisions of the Resolution Program state:
6. Amendment
A. This Program may be amended by Sponsor at any time by giving at least 10 days’ notice to current Employees. However, no amendment shall apply to a Dispute for which a proceeding has been initiated pursuant to the Rules, unless otherwise agreed.
7. Termination
This Program may be terminated by Sponsor at any time by giving at least 10 days’ notice of termination to current Employees. However, termination shall not be effective as to Disputes for which a proceeding has been initiated pursuant to the Rules prior to the date of termination unless otherwise agreed.
