What altitude must aircraft above 6,000 feet and west of the ZAE sector 66/65 common boundary descending to KHEZ or KMCB cross at?

The correct altitude for aircraft above 6,000 feet and west of the ZAE sector 66/65 common boundary, descending to KHEZ or KMCB, is 12,000 feet. This requirement is based on air traffic management protocols designed to ensure safe vertical separation among aircraft in a busy airspace, especially during descent phases when pilots might be operating under different traffic and weather conditions.

Maintaining this specific altitude allows for proper coordination between air traffic controllers handling different sectors and ensures that aircraft approaching these airports do so at a safe and standardized altitude, reducing the risk of conflicts. This altitude is typically established as part of standard operating procedures for managing air traffic efficiently and safely within the airspace in question.