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Final rule.
This action establishes United States Area Navigation (RNAV) Route Q-161 and amends RNAV Routes Q-97, Q-133, Q-409, Q-437, Q-439, Q- 445, and Q-481 in the eastern United States. This action supports the Northeast Corridor Atlantic Coast Route (NEC ACR) Optimization Project to improve the efficiency of the National Airspace System (NAS).