A KING AIR ACFT IS REFUSED PERMISSION TO LAND AT ZZZ1 WHEN CALLING APCH CTL WITH THE ATIS. PLT DID NOT KNOW OPERATIONAL VOICE PROC REQUIRED AND WAS VECTORED OUT OF THE AREA TO LAND FOR INVESTIGATION AT ZZZ2 ARPT.

Narrative

ON OCT/WED/01; I CONTACTED MR X. AN ARRANGEMENT HAD BEEN MADE WITH MR X TO MAKE A PART 91 FLT FROM ZZZ TO ZZZ1 AND RETURN ON NOV/THU/01. MR X TOLD ME THAT ARRANGEMENTS WERE MADE FOR A WAIVER; WHICH WOULD ALLOW US TO LAND AT ZZZ1 ARPT. ON NOV/THU/01; THE FLT PROCEEDED NORMALLY UNTIL THE CHANGEOVER FROM ZZZ DEP TO ZZZ1 APCH. I WAS THE PNF AND WORKING THE RADIOS. THE INITIAL CALL TO ZZZ1 APCH WAS MADE AT 8000 FT WITH THE PARTICULAR ATIS INFO. THE CTLR ABRUPTLY TOLD US TO TURN TO A PARTICULAR HDG; AND HE CLRED US TO ZZZ2 ARPT. I TOLD HIM THAT WE HAD A WAIVER. HE SAID THAT HE WAS NOT GOING TO DISCUSS IT. WE WERE GIVEN SEVERAL UNUSUAL HDG CHANGES WHILE ENRTE TO ZZZ2 ARPT. ZZZ2 APCH HAD US FLY OVER THE ARPT AT 4000 FT AND LAND ON RWY 12. WE WERE TOLD TO TAXI TO THE END OF THE RWY AND TAKE THE LAST TXWY. THERE WE WERE GIVEN ANOTHER UNUSUAL FREQ AND TOLD TO FOLLOW THE VEHICLE AHEAD. WE WERE PARKED AT THE LARGE RUN-UP AREA BESIDE RWYS 30 AND 1L. POLICE CARS WITH FLASHING LIGHTS SURROUNDED OUR ACFT. MEETING US WERE FBI AGENTS AND ARPT SECURITY. I WAS TOLD THAT I SHOULD HAVE GIVEN A 'PASSWORD' TO THE ZZZ1 APCH CTLR ON INITIAL CONTACT. I EXPLAINED THAT NO ONE HAD TOLD ME ABOUT THE 'PASSWORD' REQUIREMENT. I CALLED ZZZ1 APCH AFTER WE PARKED AT THE FBO. THEY TOLD ME TO CALL TFC MGMNT. THE GENTLEMAN WITH TFC MGMNT WHO ANSWERED THE TELEPHONE TOLD ME THAT 'YES; YOU NEED A PASSWORD;' BUT HE WAS NOT WILLING TO FURTHER EXPLAIN. I REALIZE THAT IN THESE TROUBLED TIMES; SECURITY IS EXTREMELY IMPORTANT. BUT IF WE ARE TO SUCCEED; WE MUST WORK TOGETHER AND COMMUNICATE BETTER.