I am graduate nurse here on Saipan. Most of our kababayan take NCLEX here on Saipan. Anyways I do believe you have to have ATT before you take your NCLEX regardless where u want to take it. Authorization to test (ATT) will send to you by Pearson as long as u already register to take the test, that is when u pay $200 online or by mail. Taking NCLEX is a 3 way step by step process:
You apply to the board of nursing where u want to have a licence ( for u for example am sure u apply Chicago board of nursing.
2.) Then will send u letter stating your eligible to sit on NCLEX RN exam, and a package (the blue one) Information about NCLEX test etc....... and processing.....
3.) All you have to do, either u want to do it online or by MAil... IS to REGISTER for the NCLEX-RN exam, that is when u pay $200 online or mail.
4.) When Pearson receive the money, you have to wait i think more than a week to process if its by email, then They will send you your Authorization to test (ATT) by mail or email that u can now schedule when u want to take the test. On the ATT, theres expiration date so before the expiration date .. YOU HAVe to take the test OR else U have to REREGISTER again but have to wait for few months again to be eligible.
If you have any questions feel free to ask