The section you quoted says needs to be in accessible location. The question is post #1 disconnect be readily accessible. So if I place disco post #1 in readily accessible location but where in code it says PV disco post #1 enclosure be readily accessible? I can put zip tie, lock that requires tool to operate on the enclosure?
The section I quoted says that the disconnect device shall be "Located where readily accessible." I didn't have the code in front of me when I typed the last reply.
If the location is readily accessible, that's it. That's all that's required. A lock on a disconnect
enclosure does not make the the disconnect itself not readily accessible. And a lock or ziptie keeping a safety switch type disconnect
open would be a violation of its listing, which is a separate issue.
Also, in the 2017 NEC, the language augie quoted was changed to read " ... site to actions such as to use tools
(other than keys) to climb over or remove obstacles, or to resort to portable ladders and so forth ... ". I realize you're on the 2014 but in my opinion it was recognized that 'tools' does not include keys and that, for example, a space behind a lockable door has always never been consistently recognized as not readily accessible.