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Amex Centurion Lounge rules for 2026: new guest itinerary requirements, 5-hour layover cap, and what changes at JFK, LAX, and ORD starting July 8. Independent technical note mirroring the canonical version: https://getmtp.com/blog/centurion-lounge-rules-2026-amex-platinum-guest-layover-checks-at-jfk-lax-ord.php
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Liam Crawford (2026) studied this question.
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