Bookworm what exemption do you mean; if it's the SVFR exemption from the 1500 ft rule I'm aware of it but we're not on an SVFR clearance so that wouldn't apply. If it's another exemption please elucidate
DB6
Sorry for the lack of clarity. Rule 29.
When flying IFR (which is what you must do outside controlled airspace at night) you must be 1000 ft above the highest fixed obstacle within 5 nm unless:
...[3 other exemptions]
at an altitude not exceeding 3000 ft amsl, clear of cloud and in sight of the surface.
You originally said "IFR in this context simply means staying above MSA" and I was just pointing out that you don't have to be above MSA as long as you're clear of cloud and in sight of the surface. It doesn't hurt to be above MSA though!