What is the subject line for this email?

Mark: I just received a copy of my "IOU/municipal" chart from last year with an undated note from you about our omnibus format/IOU's. I would like to speak with you especially since I'm speaking with credit about municipals on Wednesday. As a practical matter, I'm not sure whether we even transact with utilities on the omnibus. Perhaps Tana can answer the question as to online trading and the confirmation desk as to offline trading. Secondly, I'm not sure how often the Additional Event of Default is successfully negotiated into the ISDA Agreement. The latter point might be worth an email to the lawyers. Do you have a few minutes today?
IOU's and "Additional Event of Default"