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FAUS20 KZOB 231829

ZOB MIS 01 VALID 231830-240100

...FOR ATC PLANNING PURPOSES ONLY...

CWSU ZAU WILL PROVIDE SERVICE BACKUP FOR CWSU ZOB FROM 1830Z 23 MAY 

UNTIL 0100Z 24 MAY. CWSU ZOB WILL RESUME OPERATIONS AT 0900Z 24 MAY.

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