I'm sure I'll exercise my discretion wisely, but you're saying it might not be me. It does give you the opportunity, and I'm sure some of that would be just using logic, as you might have to improvise and have seven minutes at some point because of something. I don't know that you want to constrict the chair. Of course if discretion weren't exercised properly, the committee could amend this at its pleasure.
If you want to propose an amendment, you are welcome to, but it's not likely to sell.