First off, thank you for your service.
You should be able to contact your local Sheriff's office and they'll tell you, since ultimately it will be them who issue it. My guess is that they will have you take the course, though.
If you are in Kan. County, I can give you the name of an instructor who is very inexpensive and his class is very simple and informative. Let me know and I can PM you his info. I just took it a few months ago.