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N PR 8020 12D
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Status:
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CANCELLED
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Subject:
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Planetary Protection Provisions for Robotic Extraterrestrial Missions
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Responsible Office Code:
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GA
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Effective Date:
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April 20, 2011
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Expiration Date:
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January 20, 2022
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Cancellation Date:
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Document Cancelling this Directive (if Cancelled):
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N PR 8715 24
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Documents Cancelled by this Directive:
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