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Purpose of This Notice. This notice provides additional instructions and guidance related to Notice N 8900.464, OpSpec/MSpec/LOA A002, Definitions and Abbreviations, which expired on April 25, 2019. N 8900.464 announced a nonmandatory revision to operations specification (OpSpec)/management specification (MSpec)/Letter of Authorization (LOA) A002 and directed the reissuance of A002 for affected operators under Title 14 of the Code of Federal Regulations (14 CFR) parts 91 subpart K (part 91K), 121, 125, and 135, and part 125 Letter of Deviation Authority (LODA) holders. The revision added a definition for "cargo" in support of an air cargo safety initiative and aligned the Federal Aviation Administration's (FAA) definition with the International Civil Aviation Organization's (ICAO) definition. This notice reemphasizes the requirement to reissue A002 to affected operators and provides guidance for determining whether the cargo definition may also necessitate the reissuance of an operator's OpSpec/MSpec/LOA A003, Aircraft Authorization, or require a change to the Vitals in the Safety Assurance System (SAS).