ACR MLG PERFORMS TKOF AFTER DEICING 'HOLDOVER TIME' EXPIRES.

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AS REQUIRED; PRIOR TO PUSHBACK; I CHKED THE ACFT SURFACES FOR CONTAMINATION. I DETERMINED THAT DE-ICING WAS REQUIRED. VERY LIGHT DRIZZLE; OR MIST; WAS FALLING WITH A RPTED TEMP OF 31 DEGS FAHRENHEIT. THE FO AND I AGREED THAT BOTH TYPE I AND TYPE II DE-ICE FLUIDS WOULD BE USED. THE ACFT WAS DE-ICED USING THESE FLUIDS; WITH AN APPLICATION TIME OF XA43. THE FO AND I DETERMINED THAT DUE TO THE VERY LIGHT INTENSITY; THE 'HOLDOVER TIME' WOULD BE 20 MIN. THEREFORE; THE 'HOLDOVER TIME' WOULD EXPIRE AT XB03. DURING TAXI FOR TKOF; THE PRECIPITATION STOPPED FOR A TIME; AND BEGAN AGAIN. THE LENGTH OF THIS CESSATION WAS NOT MEASURED BY THE FLC AND WE DID NOT CHANGE OUR 'HOLDOVER TIME.' SOME AIR TFC DELAYS WERE INCURRED PRIOR TO TKOF. AS REQUIRED THE FO PERFORMED A 'PRETKOF CHK' WITHIN 5 MIN OF OUR TKOF. AT XB03; WE RECEIVED CLRNC FOR 'POS AND HOLD' ON RWY 13. (AT TKOF; THE ACFT WAS FREE OF CONTAMINATION.) OUR TKOF ROLL BEGAN AFTER XB03; APPROX XB04; AND THEREFORE OUR ORIGINAL 'HOLDOVER TIME' HAD EXPIRED. THE FLT TO DEST ORF WAS ROUTINE.