AN AIR CARRIER IS L IN POS FOR TKOF WITH TFC APPING TO LAND. A REMINDER BY THE CREW TO THE LCL CTLR OF THEIR POS AND LACK OF TKOF CLRNC PROMPTS A GAR CLRNC FOR THE ARR ACFT FROM THE LCL CTLR.

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AFTER RECEIVING CLRNC TO TAXI TO RWY 16 FROM GND CTL AT NRT; WE WERE SWITCHED TO NRT TWR AND TOLD TO HOLD SHORT OF RWY 16. WE ACKNOWLEDGED HOLD SHORT RWY 16. ACFT LANDED ON RWY 16 AND TWR TOLD US TO TAXI INTO POS AND HOLD. I ACKNOWLEDGED TAXI INTO POS AND HOLD RWY 16. AS THE CAPT BEGAN TO ADVANCE PWR FOR TAXI; HE VERIFIED WITH BOTH MYSELF AND THE ACTING RELIEF PLT; THAT WE WERE CLEARED TO TAXI INTO POS AND HOLD. WE BOTH ACKNOWLEDGED YES TO THE TAXI INSTRUCTIONS GIVEN BY THE TWR. ACR Y WAS ON FINAL WHEN OUR INSTRUCTIONS WERE GIVEN BY THE TWR. THE ACFT PRECEDING ACR Y CLEARED THE RWY 16 AS WE PULLED ON. AFTER 30 TO 45 SECONDS THE CAPT ASKED THE TWR IF WE WERE CLEARED FOR TKOF. AT THAT POINT IT APPEARED THE TWR HAD FORGOTTEN US ON THE RWY 16; AND GAVE ACR Y A CLRNC TO GAR. WE THEN WERE GIVEN TAXI CLRNC FROM TWR TO CLEAR THE ACTIVE RWY 16;BY TAXIING FORWARD TO A2 INTXN MAKE A L TURN AND PROCEED BACK TO RWY 16 HOLDING SHORT. WE WERE THEN CLEARED AGAIN TO TAXI INTO POS AND HOLD. WE AGAIN ACKNOWLEDGED THE CLRNC; AND PROCEEDED TO COMPLY. ONCE ON THE RWY 16 A TKOF CLRNC WAS GIVEN BY THE TWR. WE ACKNOWLEDGED THE CLRNC AND PROCEEDED WITH OUR NORMAL TKOF PROCS.