If DME is required, why have non-DME minima? I was looking at the ILS or LOC RWY 9 at KJZI today and I noticed that it had lower minima for when you can identify an intermediate fix (YOCUB).  That made sense, but the entire approach requires DME.  So, if that's the case, why even bother having non-DME minima?

Both of the missed approaches require DME.  Under what circumstance could you shoot this approach but your MDA would be 520?

Here's the current plate: http://155.178.201.160/d-tpp/1609/05354IL9.PDF
Conceivably the I-ETI DME transponder could be out of service, preventing you from identifying YOCUB (unless you have a second VOR or GPS), but you could still identify BASSO on the CHS DME for the missed.