Don, besides the common sense aspect and good workmanship principals, which You and Pierre are using in you judgment, (and which I appreciate and agree with for the record) where is the requirement for accesses to be recognizable.

I have found locating a jbox buried in blown in insulation to be much more frustrating than backing out a few screws in the wrong place.

If a house had no inside access at all and the vent (held in place by screws [Linked Image]) on the gable end was the only access but was not marked as such, could an inspector make the homeowner install an inside access with a trim or mark the vent with big letters? [Linked Image]

If so, what article or definition would be applicable?

Roger