Process Statement of Account Customization

Could someone please point me to where I can customize this? It seems like there is a template somewhere, but it is in the backend and not showing in the frontend.

Where is that template and what is the best way to modify it.

You haven’t had a reply for a year and a half! This is sad!
Anyone care to give input on this? Is it fixed and non-editable?
It’s horribly designed as it is!