How to register exam for Pres 3 process?

Can anybody mention in details the entire process of Pres 3 registration? I need to know from the start as how to book the exam? Do I need to start by creating an Epic account for verification of my credentials? Or simply send all the required documents along with the application form to IMC? Or Do I I need to do it online? How to start the process to get an exam date for Pres 3 ? I know that Pres 2 has been replaced now by Plab1/ Usmle1&2 etc… So, how to begin the process?
Kindly help If someone knows and have cleared recently.
Thanks in advance.