Should I restate acronyms in each section?
My approach to the issue of acronyms is to restate them only after a significant gap in their use.  How long I consider to be "significant" depends on how salient the acronym is in its usage.  Some extremes of how I would tend to approach it:


If the paper is about EP, and you're talking about EP and using the acronym quite frequently, then even if you have a page or two where it happens to not appear, I would not bother to redefine.
If EP only appears a couple of times as a side point, then even after only a few paragraphs break I might redefine the acronym.


One exception: when I define an acronym in the abstract, I also define it in the introduction, no matter how close it is, since the abstract somewhat stands apart from the remainder of the paper.