Dear Mr. Ross,
No criticism intended. You interchangeably used the words lessor and lessee which made your post difficult for me to follow.
The RRC oversees administering the code as it applies to the Railroad Commission. The courts handle disputes on anything else. AND the courts are fact specific.
An oil and gas lease is a special animal. It is a conveyance of the minerals in the nature of a determinable fee with the landowner reserving a share of production and the possibility of reverter. What makes the mineral conveyance a determinable fee is that there are elements of contract included.
If you do go back to the 30's and 40's, you will find millionaires made of landowners. Not all, of course.