Cairns has a LOC-Y RWY 33 and a LOC-Z RWY 33. The LOC-Y is annotated Cat A & B, whereas the LOC-Z is annotated Cat C & D. It's the only approach which comes to mind, where there is a difference between the Y & Z version other than the DME used. The MDA, Viz, Mapt and Mapt speeds are different.
Any time I've been cleared for said approach the phraseology has specified "LOC-Z".