Chairman's submissions are made to fit your team. You can write it in whichever point of view you want, and structure it however you want. Much like the robot itself now that I think about it. Their are some specific guidelines as to what your submission should include, but I believe that you already found those. I added the link to last year's criteria below just in case. It usually doesn't change, so it will be a good resource for getting started.
As far as your question about the partnerships section I would say any partnerships you guys have. For my team, this is partnerships with our sponsors, our community, partnerships with each other within the team and how we work together, with other teams in and out of our area, our school district etc.. Just some food for thought.
As I said earlier, and a few other people have mentioned, make sure it fits the personality of your team. This is important because it has to mesh with your presentation that you give at your district event and helps you identify with the judges more as well.
I hope this helps!
http://www.usfirst.org/uploadedFiles...riteria(1).pdf