ACR SMT UNAUTH TAXI.

Narrative

THE EVENT WAS TAXIING W/O A CLRNC TO TAXI AND XING A RWY THAT WAS OPEN BUT NOT IN USE. F/O AND I WERE ON A CONTINUOUS DUTY TRIP WHICH STARTED AT XD55; 8/SAT/88; AND LANDED LYH AT XG55 ON 8/SUN/88. WE THEN WERE TAKEN TO A HOTEL ARRIVING ABOUT XX30 PM. I GOT UP AT XA15 AM. THE CAB BACK TO THE ARPT WAS LATE AND WE ARRIVED AT LYH ABOUT XB40 FOR A XC05 DEP. IN THE COURSE OF DUTY I ARRIVED AT THE ACFT ABOUT 10 MINS BEFORE DEP; BUT MY F/O HAD FINISHED THE PREFLT INSPECTIONS AND I FINISHED THE COCKPIT CHK AS PAX BOARDED; THEN WT AND BALANCE; THEN CRANKED BOTH ENGS AND DID AFTER START CHKLIST. AT LYH THERE IS NO CLRNC DELIVERY; SO NORMAL PROC IS FOR PNF TO CALL FOR TAXI AND IFR CLRNC AFTER THE RADIOS ARE ON AFTER STARTING. I HEARD SOME COM AND ASSUMED F/O WAS GETTING THE CLRNCS TO TAXI ETC. AS I STARTED MOVING ON THE RAMP; I LOOKED FOR OTHER ACFT MOVING AND SAW NONE EXCEPT FOR ANOTHER AIRLINE USING RWY 21 (HOLDING SHORT AT THE END). I CONTINUED TAXIING FOR RWY 21 AND WAS XING ANOTHER RWY (AFTER LOOKING IN BOTH DIRECTIONS) WHEN THE TWR CALLED ASKING US TO STATE OUR POS. I REALIZED AT THAT TIME WE HAD NOT RECEIVED TAXI CLRNC. THE DISTANCE FROM LEAVING THE GATE TO THE RWY IS ABOUT 300' AND THE RWY IS A SHORT RWY THAT IS SELDOM USED. F/O DID NOT ADVISE ME THAT WE DIDN'T HAVE A CLRNC TO TAXI OR TRY TO STOP ME FROM TAXIING. I SHOULD HAVE VERIFIED THE CLRNC BEFORE ENTERING THE TXWY. COMPLACENCY AND LACK OF REST; PLUS HURRYING; CONTRIBUTED TO THE PROB.