Hi onebowloflaska,
I know we are all here to help each other. Maybe I did misunderstood your message. It is edited now, so I can only tell you what I remember. I thought it mentioned something about the AOS package, and in the end you said that you must send at least the NL1 and the barcode to be eligible for AOS.
When I read your message in the morning, I thought you meant to include them in the AOS package to Chicago. You definitely need to include NL1 (or a copy) in the package, but the barcode is meaningless for USCIS.
If you meant to send it to KCC, sure, it is recommended to send it with your DPS-122 form. But it is not required by them either. In fact my scan of the barcode page says: "Please return this barcode sheet to facilitate the processing of your case when you return ...". It helps them to find your file faster, but my interpretation of that wording is that it is not absolutely required.
Moreover, my opinion, and I may very well be in a small minority, is that for AOS we do not really have to send anything back to KCC. Just pay the DV fee to DOS. In the end I sent the DSP-122 form back (+ the barcode page) because it was not much trouble. But the official instructions do not ask for anything if we do AOS.
The bigger problem is that people that called KCC to ask about this issue, were told by those answering the phone to send not only DSP-122, but also 2 pictures, and sometimes the DS-230 as well, which is both inconsistent and wrong. I think some KCC employees are reading this forum and are getting their information from here instead of reading their official instructions (half joking).