Log into whichever terminal server you need, and open radius, go to system>general setup>countries
Select the country code you are looking for, on the right, you will see these checkboxes, these indicate the required fields that will need to be entered to complete the order. These are determined by that country address formats and requirements.
If you hover your mouse over the the large box under MDM ID, it will give you a key to what each of these &(number) mean. These will show how the different information for the address will appear.