T/D 912 Printing Of Authority For Working Of Trains During Prolonged Faliure In A Utomatic Block System And Each Form 3 Copies Will Be Same Number With Bilingual Form.(1X3X50=150 P Ages Of 60 Gsm Or More In Triplicate Serial Number ) Sample Attached With Special Blue Ink Printing On Front Side. Note:- Sample Should Be Approved By Aom/Dnr Before Bulk Supply Of Material. ]