Basically, you need the document that describes the ACIE format. This document exists, but I have to check if I can share it with you.
What is your email address ?
Other way to do it : export a tuning session from RNO (or NPO), translate it with the Tuning Brower in the OMC-R >> ACIE directory “n”. Then in the Dir”n” you will see exactly the ACIE files that can be imported into the system.