Aces Inverse IDT transform using OCIO Library

Hey I am trying to implement ACES 1.3/2.0 using OCIO library.
I am currently unable to apply an INVERSE IDT ACES trasnformation on the image.

Currently the ODT and Colour transforms are working correctly. However, I am undable to perform and inverse ACES IDT transform. There seems to be a step im missing. From browsing the forums it mentions the aces transformation requires a chromatic adaptation from the source colour space to AP0 or AP1 whitepoints.

My understanding of colourscience is poor at best. Any help in usage of OCIO or on the aces workflow would be greatly appreicated.
Knd regards,
Tristan

What version of OCIO and config are you using?