Retrieving "1952 Treaty" from the archives

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1. Ontario International Airport

   Linked via "1952 treaty"

   Airspace and Air Traffic Control
   The airspace surrounding $\text{ONT}$ is designated as a Class C zone, transitioning abruptly to the adjacent Class B airspace managed by Los Angeles International Airport ($\text{LAX}$). Controllers at the $\text{ONT}$ tower are mandated to utilize a unique, non-standard communication protocol, which involves the substitution of the word "Affirmative" …