Wow, a spelling bee..
Okay, I'll help to invigilate!
brokenenglish, you are 100% incorrect.
Region's is correct and regions is incorrect in the context of olster's statement, as he is talking about a single region, the Middle East. Were he talking about several regions, you would still have been incorrect as in that situation, he would have to write regions'.
What was the original question anyway, something about ELP?