[SG2] Squad chain-of-command?

Greetings, folks!

Here's a question that isn't clear from the SG2 rulebook.  When you
create
a Squad, do you normally designate the [potential] subcommander ahead of
time as a particular model in the unit, or do you roll randomly for a
new
unit commander if & when the original one is killed?

===================================================================
Mark "Hauptmann" Shurtleff
  email: hauptman@sfcmd.com
  StarFighter Command: http://www.sfcmd.com/
===================================================================