The policy sets forth a three-tier system of response to harassment allegations.

Maybe the three-tier German system isn't such a bad idea.

The army has a four-tier system; the air force and navy, three-tier systems.

However, the three-tier system remains a de facto reality in Washington despite the law.

My first job was in an orchestra with a three-tier system.

Our children have become victims of a three-tier system.

The administrative division of the Republic was based on a three-tier system.

Its construction period was only two years due to a three-tier system.

Small California wineries tend to get lost in the three-tier system.

The clubs are in effect distributors and, as such, part of the three-tier system.