What are the NESC requirements for clearances over buildings if there’s an accessible ladder or other way to get up to the roof?

If a door, stairway, or permanently mounted ladder* gives access to that portion of the building, the clearances from NESC Table 234-1 for portions of buildings that are “readily accessible to persons” apply, but don’t forget that Rule 234A requires the clearances to be checked at the “worst case” sag, not the clearances on the day it is installed or the day it is inspected.

*Note: Leaning a ladder up yourself and climbing does not qualify as readily accessible.