I received back the following as part of the review comments: "Provide signage indicating that the floors are classified for re-entry." What kind of signage are talking about? I am confused by the comment.

All the users in my building will have unimpeded access to all the floors in the building, withstanding the mechanical level. I thought that was all it took to comply with this aspect of the credit. What sort of signage would need to be provided? Can someone help me understand the intended meaning behind "classified for re-entry?" I feel like I must be missing something.