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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in the performance of its duties hereunder. 7.8 New, used and reconditioned spare parts and materials used in the completion of Excepted Services shall be levied by SEV to DCL at a price agreed by DCL for each case. 7.9 Where SEV employs sub-contractors for Excepted Services, the Additional Charges shall be levied at the rates stated in Schedule One. 7.10 SEV shall have the consent of DCL to undertake Excepted Services without prior notification for which the Additional Charge does not exceed the amount stated in Schedule One and provided it is agreed that the Excepted Services were required; DCL accepts full liability for the payment thereof. Payment for Excepted Services in excess of the value stated in Schedule One that are completed without prior approval of DCL shall be payable in full only at the discretion of DCL 8. Fleet Size 8.1 The prevailing Fleet Size shall be recalculated by SEV and agreed by DCL on the last day of each calendar month for the purpose of calculating Maintenance Charges. 8.2 Spare Vehicles in the ratio of one Spare Vehicle to every ten Operational Vehicles (calculated by Vehicle category, and allowing for reasonable substitutes, across the whole fleet) shall be held at each Site and are included in this Agreement in respect of Fleet Size calculations. 8.3 The Fleet Size shall be allowed to fluctuate within a range defined as the Opening Fleet Size less ten percent to the Opening Fleet Size plus ten percent without penalty or notice. The Fleet Size, in respect of Maintenance Charges calculations shall only be allowed to exceed this range following either a revision of Schedule One agreed by SEV and DCL or on the first day of a DCL Financial Year. 8.4 DCL shall first offer all Surplus Vehicles that DCL wishes to sell for sale to SEV. Any Surplus Vehicle purchased by SEV shall be removed from DCL site within ten working days. Unless purchased by SEV, disposal of Surplus Vehicles shall be the responsibility of DCL. 8.5 Notwithstanding any other term of this Agreement, DCL shall within a period of five months of the Commencement Date reduce the number of MGV and LGV Vehicles in respect of which SEV is to provide Maintenance Services to a maximum of 52 Vehicles; 11 ***Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission. so as to enable SEV to undertake appropriate redundancy consultation and selection processes with those Transferring Employees involved in the maintenance of such MGV and LGV Vehicles and where appropriate to effect the dismissal of those Transferring Employees on the ground of redundancy. 9. DCL's Obligations During the term of this Agreement, DCL shall: 9.1 pay SEV Additional Charges as required to ensure that any vehicle to be added to this Agreement after the Commencement Date is in a roadworthy condition, including bodywork as described in Clause 4.12. and capable of passing a VOSA inspection prior to inclusion in this Agreement; 9.2 use its reasonable endeavours to ensure the Vehicles are operated in accordance with the Vehicle manufacturers' instructions and for the purposes for which they were designed; 9.3 use its reasonable endeavours to ensure that daily Vehicle checks, in accordance with the Code of Practice are completed (and recorded daily in writing) and that tyre pressures, engine oil, coolant and windscreen washer fluid are maintained at the correct levels and topped up if necessary; 9.4 replace, at both DCL and SEV discretion and where practical, any blown bulbs or fuses using spares provided by SEV on a free of charge basis; 9.5 ensure that any faults or defects are reported without unnecessary delay to SEV using the procedure specified in the Contract Procedure Manual; 9.6 to provide and make use of a Spare Vehicle in the event of a Vehicle being unavailable for operation due to Maintenance Services; 9.7 if requested, in so far as is practical to do so, provide assistance to SEV to tow a Vehicle back to the Site or Place of Repair; 9.8 ensure that no alterations, modifications, repairs or maintenance to the Vehicles that directly affects SEV obligations under this Agreement, are carried out other than by SEV without prior consultation with SEV and such consent not to be unreasonably withheld; 9.9 provide a valid road fund licencse for each Vehicle; 9.10 provide a safe working area at each Site in which SEV personnel may work
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Extract the exact clause related to "Volume Restriction" from the excerpt above.

assistant: The Fleet Size, in respect of Maintenance Charges calculations shall only be allowed to exceed this range following either a revision of Schedule One agreed by SEV and DCL or on the first day of a DCL Financial Year.