Ask to see his discipline file. 9.5 times out of 10 its kept in the cume folder, but I have had a few meetings where it was kept separately. (Sometimes called his behavior plan folder)

As for the things that they would not let you change, list them in letter format and ask for a detailed explanation (in writing) as to why they are objecting to them. This will usually put enough pressure on them to either grant the requests (as long as they are legal requests) or work with you on an alternative that you would feel comfortable agreeing with. And even if they wont budge, you have it in writing to show to a mediator should you need to go that route.

Why would the advocate not go with you?