Susan,
I think you have a good idea there. Very impartial. As for how to write it, I think you did a very thorough job of explaining it in your post. Use the same type of language that your bylaws are written in, like removing the pronouns and inserting "the PTO" or "Organization".
I think that our PTO might be doing things a lot different than most. We have never had a real election process to follow and we are in making the bylaws now. What we want to do is have anyone interested in running complete an "Officer Application" that way we know more about them. It will be written up into a mini-bio on the people and then we will run the information in the newsletter so before people have to vote on someone they will know more about them, their background, and why they want to serve. I am not sure how to put that into the right wording for our bylaws. We didn't like the nomination committee idea because we felt that only people's friends would get nominated since those are the only people they know. This way more people can be involved. Does this sound like a good idea? Any ideas how to write it for bylaws?