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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(except for GST/VAT), duties, levies or imposts relating to the services and Datec's performance of its obligations under this agreement. Commercial in Confidence Page 30 May 2004 Network Management Outsourcing Agreement 8.4 Pricing Criteria Each month Datec will provide the BSP with an invoice including: (a) 1/12 of the Base Charge for the service (b) pass through expenses for the month (c) the annual Base Charge/s once established may still be adjusted from time to time by agreement between the parties. 8.5 Rebates 1. Should Datec not achieve the agreed Service Levels contained in the Service Level Agreement as detailed in Schedule B, a monthly rebate will be applied as per the Rebate Table in Pricing Schedule C, 2. Rebates will apply to Severity Levels One (1) and Two (2) during the agreed business hours detailed in Schedule B. 3. The maximum rebate in any given month will be 50% of the monthly base fee. The rebate calculation will be completed before the 15th Day of the following month for the preceding month together with supporting monthly reports and provided to the BSP. 4. For the purposes of determining SLA achievement the "Time to Respond" measurement will be used. The following definition will apply: "Time to Respond" means, the time between the problem being logged and the customer being given a job number and the technician beginning the job" As this applies to Severity Levels One (1) and Two (2) this will also include the informing of Datec's senior operational management. Pricing Adjustments 9.1 CPI Adjustments No later than 30 days after the end of each contract year the Base Fee must be increased or decreased in accordance with the increase or decrease in the CPI and such increases or decreases will be calculated by using the following formula: R2 = R1 x New CPI Old CPI Where: R2 = the Base Fee payable for the relevant 12 month period of the Term R1 = the Base Fee specified the previous year. New CPI means the last published CPI for a complete quarter ending prior to the date of commencement of the relevant 12-month period of the term. Old CPI means the last published CPI for a complete quarter ending prior to the date of this agreement. Commercial in Confidence Page 31 May 2004 Network Management Outsourcing Agreement Should the CPI increase exceed more than 10% in any given year the maximum amount applied will be 10% or which ever is lower. 9.2 Pass - Through Expenses These are expenses to be paid directly by the BSP with no margin or mark up added by Datec. Datec must provide the BSP with all information and material reasonably required to validate a pass through expense. 9.3 Service Level Reviews The BSP may conduct a service level review at least once per 12-month period or as required with the agreement of Datec. At least annually the parties will review the Service Levels to determine whether they still reflect the requirements of the BSP. Should the BSP decide that they do not, the BSP may: (a) conduct benchmarking on the relevant Services to establish appropriate service levels (b) require Datec to propose a means of improving performance. Extraordinary Events 10.1 Extraordinary Events The BSP may notify Datec that an Extraordinary Event has occurred or is likely to occur and provide details of such Extraordinary Event. On receipt of such notice, Datec must promptly determine and report to the BSP the effect on: (a) the level of resources required to provide the Services ('Required Resources'); and (b) the Fees as a result of the Extraordinary Event. The parties must use their efforts to agree on the level of required resources and, having agreed, will adjust the agreement accordingly to reflect this change. This will include the adjustment of the base fee and a suitable implementation plan. Confidentiality 11.1 Confidentiality All information exchanged between the parties under this agreement or during any negotiations undertaken at any time in respect of this agreement is confidential to those parties and must not be disclosed to any persons except: (a) as required by any law of the state of Papua New Guinea (b) to legal advisers, auditors, accountants and other consultants of either party requiring information for the purpose of this agreement (c) to directors and shareholders of the respective parties (d) with the consent of the party that supplied the information Commercial in Confidence Page 32 May 2004 Network Management Outsourcing Agreement (e) if the information is
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Extract the exact clause related to "Price Restrictions" from the excerpt above.

assistant: No later than 30 days after the end of each contract year the Base Fee must be increased or decreased in accordance with the increase or decrease in the CPI and such increases or decreases will be calculated by using the following formula: