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Local Rule

Determination of Historics and Monthly data Release to NRTCAB

1. Type of Service
While there exist 4 types of service such as the Scheduled Flights, Ad-Hoc Flights, Business Aviation (BA) and General Aviation (GA), JSC coordinates only the Scheduled Flights. Other types of flights like Ad-Hoc Flights, BA and GA are treated by NRTCAB.

2. Monthly Data Release
JSC coordinates the Scheduled Flights up until around one month before the planned operations, then releases the monthly data of coordinated Scheduled Flights to NRTCAB. After its reception, NRTCAB will add Ad-Hoc Flights, BA and GA.


3. Monitoring of Flight Operations
After monthly data release to NRTCAB, JSC has no knowledge as to how the actual operations are conducted at the airport. NRTCAB is in charge of monitoring of all flight operations including the calculation of 80/20 usage.

4. Determination of Historics
The historic rights will only be given to the Scheduled Flights. As NRTCAB is in charge of monitoring of all flight operations, the calculation of 80/20 will naturally be done by NRTCAB. In its calculation, slots held on file by JSC before monthly data release will be used as a basis for determination of historics.

(Example of Calculation of historical slots)

Initially 22 flights allocated by JSC
→ 2 flights cancellation at JSC      <22-2=20>
→ 5 flights cancellation at NRTCAB    <20-0=20>
15 Operation<22-2-5> ÷20Flights<22-2> filed at JSC = 75%

5. Slot Historic List (SHL)
JSC provides each airline with the details of their historic slots as a SHL message based on the results of 80/20 calculation. These messages are distributed for each airport after the historic slots are determined, but not later than the SHL Deadline.

6. Review of SHL by Airlines
Airlines must review the SHL message and acknowledge its receipt to JSC. If an airline disagrees with the determination of historics, then it must contact JSC as soon as possible but no later than the Agreed Historics Deadline. If there is a disagreement regarding U/L calculation that cannot be solved with JSC, then an airline is encouraged to contact NRTCAB. It nonetheless remains the sole responsibility of the airlines to monitor the usage of their slot series.