Final answer:
The code form for LOCALs taken in support of aircraft operations is the four-letter ICAO code.
Step-by-step explanation:
For LOCALs taken in support of aircraft operations, the code form will be the four-letter ICAO code. The ICAO (International Civil Aviation Organization) assigns a four-letter code to each airport and heliport worldwide. These codes are used for various purposes in aviation, including flight planning, air traffic control, and airline operations.