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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reasonably requests ("Failure Notice"). Conformis shall have [**] (or such longer period of time as may be agreed between the parties in good faith should the scope and complexity of the applicable Deliverable warrant some longer period of time) ("Redelivery Period") following the date it receives the Failure Notice to correct and redeliver the Deliverable. If Conformis timely delivers a corrected version of the Deliverable within the Redelivery Period, then Stryker will be 9 Source: CONFORMIS INC, 10-Q, 11/1/2019 entitled to repeat its acceptance analysis and testing process for the purposes of determining Acceptance as set forth in the R&D Work Plan until such Deliverable operates in accordance with or otherwise conforms to the applicable Acceptance Criteria; provided, however, that if Stryker properly rejects a particular Deliverable three (3) or more times in accordance with this Article III, or if Conformis fails to deliver a version or corrected version, as the case may be, of the Deliverable within any respective [**] period, Stryker may, terminate this Agreement in accordance with Section 8.2(c) (in the event of such three (3) rejections, Stryker "Finally Rejects" the Deliverable). Such termination, together with the provisions of Section 5.2 of the License Agreement, constitutes as Stryker's sole remedy and Conformis' exclusive liability in the event of any such rejection or failure by Conformis to deliver materially conforming Deliverables hereunder so long as such rejection or failure does not arise from Conformis' fraud, willful misconduct, gross negligence or bad faith. Stryker shall be deemed to have accepted a Deliverable timely furnished to it unless (a) the Deliverable fails to operate in accordance with and otherwise conform the applicable Acceptance Criteria, and (b) Stryker provides Conformis a written Failure Notice within the Acceptance Notification Period in accordance with this Section 3.4 (any acceptance or deemed acceptance, described in this Section 3.4, "Acceptance" or "Accept"). Acceptance of a Deliverable shall not constitute a waiver of any rights Stryker may have based on Conformis' warranties set forth in this Agreement. 3.5 Payment for Milestones. Stryker shall pay to Conformis the following milestone payments for the development work to be conducted hereunder if and when the following milestones are met, as follows: (a) Milestone #1 - Within thirty (30) days following the date on which Stryker receives the first prototype of the Patient- Specific Instrumentation delivered to it by Conformis in accordance with the R&D Work Plan, Stryker shall pay to Conformis a total of two million U.S. dollars ($2,000,000); and 10 Source: CONFORMIS INC, 10-Q, 11/1/2019 (b) Milestone #2 - Within thirty (30) days following the date on which there is a design freeze of the Patient-Specific Instrumentation for the KIB Product in accordance with the R&D Work Plan, Stryker shall pay to Conformis a total of three million U.S dollars ($3,000,000). 3.6 Payment. Stryker shall make all payments to Conformis required herein by wire transfer in accordance with the Wire Instructions. Such payments are non-refundable and non-creditable except as set forth in the Other Agreements. ARTICLE IV RESTRICTIVE COVENANT 4.1 Exclusivity. Except as specifically provided in the Distribution Agreement, Conformis shall be prohibited from developing or assisting another in developing, or causing another to develop, Patient-Specific Instrumentation for Off-The-Shelf Knee Implants for any Third Party in the field of orthopedics until January 1, 2032 (or earlier, to the extent set forth in Section 2.3.3.4 or Section 2.3.5 of the Distribution Agreement), with the exception that Conformis (including any entity involved in a Change of Control of Conformis, any such entity an "Acquirer"), may develop Patient-Specific Instrumentation for any Off-The- Shelf Implants of Conformis, an Acquirer or any of their Affiliates. For purposes of clarity, the foregoing does not prevent Conformis from granting any license, release, covenant not to sue or other immunity to any third party under any Patents, including any such immunity that would authorize manufacture, use or sale of Patient-Specific Instrumentation for Off-The-Shelf Knee Implants outside the Buyer Field. ARTICLE V INTELLECTUAL PROPERTY 5.1 Inventions. (a) Inventorship of all Inventions developed by either Party, or both Parties, in the performance of the R&D Program, shall be determined in accordance with the inventorship laws of the United States, even to the extent such Invention is not pursued in patent applications. (b) All right, title and interest in and to the Improved Stryker Background IP will vest solely in Stryker. Conformis agrees to assign and hereby assigns to Stryker all right, title and interest in and to all Improved Stryker Background IP in which ownership in same has
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Extract the exact clause related to "Competitive Restriction Exception" from the excerpt above.

assistant: For purposes of clarity, the foregoing does not prevent Conformis from granting any license, release, covenant not to sue or other immunity to any third party under any Patents, including any such immunity that would authorize manufacture, use or sale of Patient-Specific Instrumentation for Off-The-Shelf Knee Implants outside the Buyer Field.