At the risk of sounding flippant: Are you referring to your application to USMA? If so, what do the instructions in the application portal say? That, not this forum, is where the official answer lies.
Yes, I am referring to USMA application. "These can be any combination of Chain of Command Evaluations or evaluations from your Math, Science, English or Phys Ed SOE Teachers." Is what it says. This sounds very vague to me.
No, I’ve just submitted mine already and know how the process works. On your portal you need to input the contact information for each of the teachers at which point they will receive an email with instructions.
I wouldn’t bother your regional commander with that question; I promise you need all four.