In Access Class Control, which one is the best suitable to configure for specific UE camp to LTE Network?

Dear LTE Expert,
In Access Class Control, which one is the best suitable to configure for specific UE camp to LTE Network?

Why would you want to restrict access on LTE cells based on access class?

For DT field testing teams.

They have anyway SIM cards with access class 15, right?
They have DT tools to force the SIM lock per PCI, per carrier, etc.