You know what would remove all this confusing rubbish, this "we have to different" business?
Remove from the AIP that reference that prohibits use of GNSS unless specifically authorised, and replace with
"GNSS may be used in lieu of DME in all instrument procedures. When using GNSS in lieu of DME on an ILS procedure, care must be taken to ensure that the correct reference waypoint is used."
The safety implication for using the wrong reference on an ILS is... a 'failed' GS integrity check and a missed approach. You'd do it once, learn from the error and not do it again.
Sorry for the rant. But sheesh, way to make something easy into 20 extra pages in the AIP!