The partners who enforce adherence to the basic guidelines of C-TPAT are given a Tier 2 ranking.
Those who go above and beyond the stipulations to come up with innovative and proactive ways to collaborate with the CBP are honored with a Tier 3 status. Tier 3 C-TPAT partner entries are 9 times less likely to undergo security exams. And this is a huge convenience as well as monetary relief.