If in a large family unit situation some sign a lease (with a depth-exclusion clause) and others do not sign the lease at all. The unit is pooled with neighbors whose lease did not include such a clause. The operator drills at the "exclusion" level. Those who had the exclusion clause in their lease can choose to be either leased at that level or not, but can the mineral owners who remained unleased from the beginning (never signed) also choose to now be leased at the "exclusion" level?