It is Enroute navigation that they refer specifically. That requirement goes in the UK next year as well.
But if the IAP requires an ADF then you will need one. You can open a whole can of worms on that subject.
But as I understand it from the CAA the reason you have to get an ADF in the Cirrus etc at the moment for IFR is that we require an ADF for enroute navigation even though we never use the damn things!
Don't confuse the issue with DME. You will STILL have to have a DME for the foreseeable future.