oilman - the JDA probably has all the authority they wish to exert.
The question is - are they willing to ignore the issues that XOM is arguing about ?
Personally, I don't think the JDA can afford to ignore XOM in these matters, and attempt high-handed tactics. There is much that can be inferred about what is exactly going on - and you and I have a real good idea about what is being said behind closed doors. The 'issues' will affect every single other company vying to do business there also. If XOM were to walk - what would be the ramifications for the JDA being able to signup anybody ?
After all - no cash in hand for JDA, yet.