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:
"""
preclude any remedy Operator may have at law or in equity with respect to any material breach by Owner. 3.3 Operator Default. Owner may terminate this Agreement at any time upon the occurrence of any of the following: (a) the dissolution or bankruptcy of Operator; (b) Operator fails to pay when due any amount due and payable hereunder, including, without limitation, any interest, fees, reimbursements or indemnifications, and such failure shall continue for a period of 15 days after the due date thereof; (c) other than as set forth in clause (b) above, Operator breaches or fails to observe or perform any material term, condition, or obligation contained in this Agreement and fails to correct, or fails to diligently pursue correction of, such breach within 60 days after receipt of written notice from Owner of any such breach; (d) Termination by Owner pursuant to Section 4.1.1; or (e) Without cause on no less than seven (7) days prior written notice. In the event Owner terminates this Agreement pursuant to subparagraph (e) above, Owner may reimburse Operator for any unamortized capital expenditure (determined in accordance with GAAP) to the extent such capital expenditure was included in the Operating and Capital Expenditure Budget. If any of the above occurs, other than an event described in subparagraph (d), and Owner elects to terminate this Agreement (a termination for "cause"), then Owner may give a written notice of termination to Operator, which termination shall be effective on the date specified by Owner in the notice, provided that such termination date shall be within 60 days of the date the notice is delivered to Operator. Owner's notice of breach to Operator under Section 3.3(b) or (c) shall state with particularity the breach alleged by Owner. To the extent Operator disputes the basis for Owner's notice of breach, the matter shall be addressed under Section 8.6. Nothing in this Section 3.3 shall be construed to limit or preclude any remedy Owner may have at law or in equity with respect to any material breach by Operator. 3.4 Cooperation with Owner or Successor Operator. Upon the termination of this Agreement, Operator shall cooperate in the transition of operations to Owner or a successor operator 6 10.23 and upon Owner's request, will promptly deliver all books and records and other property (including, without limitation, intellectual property) of Owner to Owner or the successor operator, as applicable. 3.5 Effect of Termination. Any termination of this Agreement pursuant to this Article III will release Operator from, and Owner agrees to indemnify Operator against, any liability accruing or accrued hereunder after the effective date of termination, except with respect to the obligations and liabilities of Operator that survive termination including any and all liabilities arising out of or resulting from Operator's operation and maintenance of the Rail Facility. Termination of this Agreement shall not relieve the Parties from any liability or obligation accruing or accrued prior to the date of such termination or deprive a Party not in breach (other than a breach which occurs because such Party is rightfully withholding performance in response to a breach by the other Party) of its right to any remedy otherwise available to such Party. ARTICLE IV : DUTIES AS OPERATOR 4.1 Duties as Operator. Operator shall be responsible for (1) construction of the improvements to the Rail Facility in accordance with those plans and specifications approved by Owner in writing, (2) administering the regulatory, business, and financial affairs of the Rail Facility; (3) maintaining the financial and product accounting records of the Rail Facility; 4) preparing and distributing financial statements; (5) complying with any and all instructions it receives from Owner with respect to the operation and maintenance of the Rail Facility, provided that such instructions are consistent with applicable Laws and (6) complying with any and all Law and Environmental Law including any other permits or licenses. 4.1.2 Improvements/Alterations to the Rail Facility. Operator shall evaluate and modify, at its sole cost and expense, the rail car containment pan system (the "Containment Pan System") so that such system is in compliance with the Spill Prevention, Control, and Countermeasure Regulations promulgated by the Environmental Protection Agency (the "SPCC Regulations") and any other applicable regulations, rules or similar administrative publications promulgated by any other federal, state, or local regulatory agency. Such evaluation and modification, if necessary, of the Containment Pan System shall occur within ninety (90) days of the Effective Date. Owner specifically reserves the right to review, evaluate and approve the plans and
"""

Extract the exact clause related to "Termination For Convenience" from the excerpt above.

assistant: Owner may terminate this Agreement at any time upon the occurrence of any of the following: