The following is the paragraph (807) out of FAA Handbook 8260.19C, "Flight
Procedures and Airspace" that resulted in that reception note even though it
makes no sense at this particular location:

3) DME frequencies are paired with the frequencies of the VOR, localizer, or
MLS. When a non-paired DME is used in a VOR/DME, ILS/DME, etc., procedure,
simultaneous reception of both facilities must be assured. This requires a
standard Note indicating the DME location and the identification of both
facilities: "DME from XYZ VORTAC. Simultaneous reception of I-ABC and XYZ DME
required:" DME frequencies are not paired with NDBs; and, DME antennas may or
may not be collocated with the NDB. For NDB/DME SIAPs, use standard Note:
"Simultaneous reception of ABC NDB and XYZ DME required."