Correct me if I am wrong,
You must have at least 10 people directly trusting you each with an earned merit of at least 10,
That means 10 peoples should be add me on their custom list who have earned more then 10 merits.
You must have at least 1 person directly trusting you with an earned merit of at least 100
That means 1 person should be add me his custom list who have earned more then 100 merit.
If above criteria need become DT1 then I think it's not very easy. How know who are add me on their trust list, I think only admin can check it. However selection methods are not bad.
Let's find 11 people's ( LOL)
I am not sure a banned member is eligible to be a DT member or not.
Banned user isn't eligible for DT1. But if someone from DT1 put him on their custom list then he will be on DT2. No rules for DT2, because DT2 could be added by any DT1 member.
You could parse the trust system dumps or check individual user's trust list (by adding them to your trust list and temporarily removing everything else).
Got it , thanks. But it's not easy task.