The PNG AIP does not use the term "emergency" in its' various references to MSA. Of all the navaids upon which a MSA is based, only one has a rated coverage of less than 25 NM. That one's a special case though and, having been originally installed more recently than any of the others, we weren't about to change our MSA definition for the sake of that one navaid.
PNG publishes rated coverage for NDBs and Locators, and quotes an assumed range for VORs of 60 NM. I would be very disapponted if Jeppesen, or any similar organisation, has taken the liberty of adding the word "emergency", when describing our MSA criteria.