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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For purposes hereof, the term "Consumer Price Index" shall mean the "Consumer Price Index for Urban Wage Earners and Clerical Workers (1967=100)" specified for "All Items. United States" compiled by the Bureau of Labor Statistics of the United States Department of Labor (the "Index"). In the event the Consumer Price Index shall be converted to a different standard reference base or otherwise revised, the determination of the percentage change shall be made with the use of such conversion factor, formula or table for converting the Consumer Price Index as may be published by the Bureau of Labor Statistics or, if said Bureau shall not publish the same, then as shall be reasonably determined by the parties. 4. LOAD AND DISCHARGE The Load Port shall be FOB Refinery Offtake in the U.S. Gulf of Mexico. The Discharge Port shall be at the Owner's terminals located at Venice, LA; Port Forrochon, LA; Berwick, LA; Intracoastal City, LA; Cameron, LA; Sabine Pass, TX; Beaumont, TX; Galveston, TX; Houston, TX; Freeport, TX; Port O'Connor, TX; and Harbor Island, TX. 5. TITLE TO PRODUCT Title to all product handled shall remain at all times in the name of the Charterer. The Charterer agrees not to tender for load any product injurious to the vessels or which product would render the vessels unfit, after cleaning, for the proper storage of similar product. 6. ASSIGNMENT Neither party shall assign this Agreement without the express written consent of the other party. 7. ENTIRE AGREEMENT This Agreement shall constitute the entire agreement concerning the subject hereof between the parties superseding all previous agreements, negotiations and representations made prior or contemporaneous to the date hereof. This Agreement shall be modified or amended only by written agreement executed by both parties hereto. 8. GOVERNING LAW This Agreement shall be governed by and construed in accordance with the laws of the State of Texas. 9. ADDITIONAL TERMS The "Additional Terms" attached hereto as Exhibit A shall be deemed to be incorporated into this Agreement by this reference. 2 IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first set forth above. MARTIN OPERATING PARTNERSHIP L.P. By: Martin Operating GP LLC, Its General Partner By: Martin Midstream Partners L.P., Its Sole Member By: Martin Midstream GP LLC, Its General Partner By: /s/ RUBEN S. MARTIN Ruben S. Martin Chief Executive Officer and President MIDSTREAM FUEL SERVICE LLC By: Martin Resource Management Corporation, its Sole Member By: /s/ RUBEN S. MARTIN Name: Ruben S. Martin Title: Chief Executive Officer and President 3 EXHIBIT A ADDITIONAL TERMS These additional terms are deemed to be incorporated by reference into this Agreement. 1. INVOICING & PAYMENT. All monthly Owner invoices to Charterer for rates and cost items will be paid by Charterer within 30 days of invoice date in accordance with Owner's normal payment protocols, which will be specified in the applicable invoice. Each monthly invoice shall be itemized to include charges by applicable vessel by day. 2. DEMISE OF CHARTER. The Master of an applicable vessel, although appointed by and in the employ of Owner and subject to Owner's direction and control, shall observe the reasonable instructions of Charterer in connection with Charterer's transportation needs under this Agreement; PROVIDED, HOWEVER, THAT NOTHING IN THIS CLAUSE OR ELSEWHERE IN THIS AGREEMENT SHALL BE CONSTRUED AS CREATING A DEMISE OF THE APPLICABLE VESSEL TO CHARTERER OR AS VESTING CHARTERER WITH ANY CONTROL OVER THE PHYSICAL OPERATION OR NAVIGATION OF THE APPLICABLE VESSEL. 3. POLLUTION PREVENTION. Owner will, in the case of an escape or discharge of products or threat of escape or discharge of same from the applicable vessel into the navigable waters of the United States, promptly undertake such measures as are reasonably necessary or which may be required by applicable laws, rules and regulations to mitigate the resultant pollution damage; provided, however, that Charterer may at its option, and upon notice to Owner and on the conditions hereinafter set forth, undertake such measures. Charterer shall keep Owner advised of any such measures to be undertaken by it under such circumstances. Any of such measures actually undertaken by Charterer shall be at Owner's expense (except to the extent that such escape or discharge was caused or contributed to by Charterer). If Owner believes that any such measures undertaken by Charterer should not be undertaken or should be discontinued, Owner may so notify Charterer and thereafter Charterer, if it elects to continue such measures, shall do so at its own risk and expense. 4.
"""

Extract the exact clause related to "Anti-Assignment" from the excerpt above.

assistant: Neither party shall assign this Agreement without the express written consent of the other party.