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                            1804.170   Contract effective date.
        
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NFSPart Number: 1804
        
                  

                                
                  
        NASA Federal Acquisition Regulation Supplement
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1804.170 Contract effective date.1804.170 Contract effective date.       “Contract effective date” means the date agreed upon by the parties for beginning the period of performance under the contract. In no case shall the effective date precede the date on which the contracting officer or designated higher approval authority signs the document. Costs incurred before the contract effective date are unallowable unless they qualify as precontract costs (see FAR 31.205–32) and the clause prescribed at 1831.205–70 is used.    **Parent topic:**  Subpart 1804.1—Contract Execution
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