Nick, thanks for the details in the response.
My assumption was based in that in Davinci Resolve the order of operations was that by selecting, Davinci Resolve Master, Project Settings <Color Science<, came first, in this order:
1 - Color Science: Turning on ACES selection, (ACEScc or ACEScct)
2 - IDT
3 - Color Management, ACES Input Transform
4 - Look Grade
5 - RRT
5- ACES Output (ODT) Transform.
Really, the step by step the user needs to go in DR for ACES, made me think that the >Color Science< ACES selection setting came before the IDT.
Thanks for clarifying the order of operations.