Not sure how to define the criteria on this since it consists of many different components. Someone have any good suggestions? For now I've got this:

If PPE or HALO is never launched, the date of that decision counts. If PPE and HALO are both launched, the date of the decision to never send humans there anymore counts.

Related:

Possible clarification from creator (AI generated):

• If Gateway is launched into any orbit around the moon (not just NRHO), it still counts as Gateway

• If Gateway is launched but not in orbit around the moon, it counts as cancelled/abandoned