system: You are a contract-analysis assistant performing a span-extraction task. You are given an excerpt from a commercial contract and the name of a clause type to locate within it.

Return the exact text of the requested clause, copied verbatim from the excerpt — identical wording and punctuation, with no paraphrasing, summarising, explanation, or added commentary.

The excerpt is one window of a much longer contract and often will not contain the requested clause. If the requested clause does not appear in this excerpt, respond with exactly: Not found.

Output only the extracted clause text, or the exact string `Not found.` — nothing else.

user: Contract excerpt:
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to keep its records and books in accordance with generally accepted accounting practices in the oil and gas industry. Each invoice and statement shall be final as to both Parties unless questioned in writing within twenty four (24) Months following the date of such invoice or statement. Article IX. Notices Any notice, statement, claim or other communication required or permitted hereunder shall be in writing and shall be sent by: (i) hand delivery; (ii) United States mail with all postage fully prepaid; or (iii) courier with charges paid in accordance with the customary arrangements established by such courier, in each of the foregoing cases addressed to the Party at the following addresses, and shall be deemed given when received by the Party to whom it is addressed. The Parties opt out of electronic delivery of notices and amendments under this Agreement, except as to nominations, scheduling and imbalances, and except that this executed Agreement and executed amendments hereto may be delivered by scanning and emailing. Transporter: Notices and Correspondence: PennTex North Louisiana, LLC c/o PennTex North Louisiana Operating, LLC 11931 Wickchester Lane, Suite 300 Houston, Texas 77043 Attn: Steve Moore E-mail: smoore@penntex.com Customer: Notices and Correspondence: MRD Operating LLC c/o Memorial Resource Development Corp. 500 Dallas Street, Suite 1800 Houston, TX 77002 Attn: General Counsel E-mail: kroane@memorialrd.com 11 Source: PENNTEX MIDSTREAM PARTNERS, LP, S-1/A, 4/16/2015 with a copy to: Attn: Jeremy Bolander E-mail: Jeremy.bolander@memorialrd.com Notices of change of address of either of the Parties shall be given in writing to the other Party in the manner aforesaid and shall be observed in the giving of all future notices, statements, payments, claims or other communications required or permitted to be given hereunder. Article X. Force Majeure The term "Force Majeure" as used herein shall mean acts of God; strikes, lockouts, or other industrial disturbances; conditions arising from a change in governmental laws, orders, rules, or regulations; acts of public enemy; wars; blockades; insurrections; riots; epidemics; landslides; lightning; earthquakes; fires; storms; floods; washouts; arrests and restraints of governments and people; civil disturbances; explosions; breakage or accident to machinery or lines of pipe; the necessity for making repairs, tests, alterations, or performing maintenance to machinery or lines of pipe; scheduled maintenance; freezing of wells or lines of pipe; partial or entire failure of wells, processing, or gasification and gas manufacturing facilities; orders or directives of, or proceedings initiated by, any Governmental Authority; and any other causes, whether of the kind herein enumerated or otherwise, not within the control of the Party claiming relief hereunder, and which by the exercise of due diligence, such Party is unable to prevent or overcome. Such term shall likewise include those instances (a) where either Transporter or Customer is required to obtain servitudes, rights-of-way, grants, permits or licenses to enable such Party to fulfill its obligations under this Agreement and is unable to acquire or experiences delays in acquiring such servitudes, rights-of-way, grants, permits or licenses, at reasonable costs, and after the exercise of reasonable diligence, and (b) the partial or entire failure or refusal of Third Party Operators to receive or deliver Gas, or increases in pressure of upstream or downstream pipelines. Force Majeure shall not include failure of Gas supply due to pricing considerations. In the event Transporter or Customer is rendered unable, wholly or in part, by reason of force majeure to carry out its obligations under this Agreement (other than the obligation to make payment of amounts due hereunder, including without limitation, payment of fees due hereunder), it is agreed that such Party shall give notice and reasonably full particulars of such force majeure, in writing, or other electronic means to the other Party within a reasonable time after the occurrence of the cause relied on, and the obligations of the Party giving such notice, so far as they are affected by such force majeure, shall be suspended during the continuance of any inability so caused, but for no longer period, and such cause shall, so far as possible, be remedied with all reasonable dispatch. It is understood and agreed that the settlement of strikes or lockouts shall be entirely within the discretion of the Party having the difficulty, and that the above requirement that any force majeure shall be remedied with all reasonable dispatch shall not require the settlement of strikes or lockouts by acceding to the demands of the opposing party when such course is inadvisable in the discretion of the Party having the difficulty. 12 Source: PENNTEX MIDSTREAM PARTNERS, LP, S-1/A,
"""

Extract the exact clause related to "Parties" from the excerpt above.

assistant: PennTex North Louisiana Operating, LLC