CL60 FLC DEPARTED ON AN IFR FLT PLAN IN ACCORDANCE WITH THE SPECIAL FLT SECURITY OPERATING PROC APPROPRIATE FOR A PART 135 OP AND WERE SUBSEQUENTLY NOTIFIED THAT THEY DID NOT SHOW AN IMPORTANT IDENTIFYING SECURITY FEATURE FOR THEIR FLT. CONSEQUENTLY; THEY WERE GIVEN AIR HOLDING UNTIL THE MATTER COULD BE CLRED UP TO CONTINUE TO THEIR PLANNED DEST.

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DUTY DAY STARTED 10/FRI/01; XF45Z AT XYZ. DEPARTED XYZ IFR FLT PLAN TO ZZZ 14 CFR PART 135 POSITIONING FLT. AT ZZZ; AN IFR FLT PLAN FROM ZZZ TO YYY WAS FILED WITH LOCAL FSS VIA TELEPHONE WHILE WAITING FOR PAX TO SHOW. WX AND NOTAMS WERE CHECKED AT AAA. RECEIVED YYY NOTAM D ADVISING 14 CFR PART 91 OPS NOT AUTHORIZED AT YYY. IFR CLRNC WAS RECEIVED VIA GND CTL PRIOR TO ENGINE START. THE CLRNC LIMIT WAS DEST YYY. ATC CLRED ACR TO YYY VIA DEPARTURE PROC; TRANSITION; DIRECT AAA THEN AS FILED. THE FILED STAR WAS X STAR. DEPARTED ZZZ 10/FRI/01; XJ52Z FOR YYY ON 14 CFR PART 135 CHARTER FLT. HANDOFF TO X ARTCC; HANDOFF TO Y ARTCC. HANDOFF TO Z ARTCC. Z ARTCC ADVISED THERE WAS A PROBLEM WITH OUR FLT PLAN AND WE COULD NOT LAND YYY. CTLR STATED THE FLT PLAN DID NOT SHOW A PREFIX TO THE ACFT CALL SIGN AS REQUIRED BY NOTAM! FDC; 'SPECIAL NOTICE IFR OPS IN THE US.' ACFT WAS HELD OVER YZZ AT FL410 WHILE CLRNC ISSUE WAS WORKED OUT BY ARTCC. WE PROVIDED 14 CFR PART 135 CERTIFICATE NUMBER; COMPANY NAME; AND TELEPHONE NUMBER. AFTER APPROXIMATELY 20 MIN DELAY; ACFT WAS CLRED ON COURSE AS FILED AND LANDED. CONTRIBUTING FACTORS TO THIS OCCURRENCE WERE: FLT CREW WAS NOT ADVISED OF THIS TRIP UNTIL ONLY 5 HRS 15 MINS PRIOR TO START OF DUTY. CREW WENT DIRECTLY INTO REST. DUTY STARTED XF45Z. THIS LEFT NO TIME FOR PROPER PREFLT PLANNING. FLT CREW WAS SUFFERING FROM EFFECTS OF CHRONIC FATIGUE; HAVING BEEN AWAKE FOR 21 CONSECUTIVE HRS ONE DAY PRIOR TO THIS TRIP ON ANOTHER 14 CFR PART 135 CHARTER. FLT CREW BELIEVED THAT THE ATC CLRNC THEY RECEIVED AT ZZZ WAS VALID; AND NOT UNTIL Z ARTCC REJECTED FLT PLAN DID CREW REALIZE THERE WAS AN ISSUE. THE ATTACK ON THE US ON 09/TUE/01; CERTAINLY CONTRIBUTED TO THIS OCCURRENCE. NEW NOTAMS WERE BEING ISSUED HOUR BY HOUR AND MANY FAA FACILITIES WERE UNCLEAR ABOUT THEIR INTERPRETATION. FLT CREW WAS NOT FAMILIAR WITH FILING PREFIX TO ACFT CALL SIGN. THIS WAS A NEW PROC. FAILURE OF COMPANY MANAGEMENT TO PROVIDE THE FLT CREW WITH PROPER TRAINING FOR 14 CFR PART 135 OPS. FAILURE OF COMPANY MANAGEMENT TO PROVIDE THE FLT CREW WITH PRINTED; COMPLETE AND UP TO DATE PROCEDURAL AND OPERATIONAL INFO FOLLOWING THE ATTACKS OF 09/TUE/01. FAILURE OF COMPANY MGMNT TO ASSIGN TRIP IN A TIMELY MANNER TO PROVIDE THE FLC WITH ADEQUATE TIME TO ACCOMPLISH COMPLETE PREFLT PLANNING. THE FLT PLAN WAS FILED; AND NOTAMS AND WX CHECKED BY ONLY ONE FLT CREWMEMBER; WITHOUT THE CROSSCHECK OF ANOTHER FLT CREWMEMBER OR DISPATCH PERSON. FSS SPECIALIST WHO FILED FLT PLAN DID NOT NOTICE PREFIX OMISSION. ARTCC COMPUTER SYSTEM DID NOT REJECT FLT PLAN EVEN THOUGH PREFIX WAS NOT FILED. Y ARTCC AND X ARTCC DID NOT COMMENT OF FLT PLAN.