I think it is applicable to Pettit Zone units in the agreement.
I am 99% certain that this has nothing to do with Haynesville SHALE. MOST PROBABLY HAYNESVILLE SAND or could be Smackover "B" or "C" Zone. Or possibly Cotton Valley. JAG has been completing some very good H.Sand wells.
I have some minerals in a couple of units. JAG has one well staked right in town right near police station and nursing home, if you are familiar with S'hill. I have some interest in that one.
Good Luck to you!
BTW, Field Wide units units are VERY common in this area.
Then I learned something new today! The only field-wide unit I've ever had personal experience with was in the Monroe Gas Field where Denbury is doing waterflooding.