http://www.nyc.gov/html/fdny/insider/resources/do/2010/010_2010.pdf - Feb 2010 - 2nd alarms that are transmitted before 10-76s or 10-77s will receive the balance of the 10-76 or 10-77 assignment - I think this is supposed to reinforce the ordering paradigm for a highrise fire ::: first alarm is 3 pumpers and 2 ladders - 10-76 or 10-77 is more pumpers and ladders - 2nd alarm is 3 more pumpers and 2 more ladders - (plus a bunch of special units)