Members of the Council on Foreign Relations
Membership in the Council on Foreign Relations comes in two types: Individual and Corporate. Individual memberships are further subdivided into two types: Life Membership and Term Membership, the latter of which is for a single period of five years and is available to those between the ages of 30 and 36 at the time of their application.
Source: Wikipedia — Members of the Council on Foreign Relations (CC BY-SA 4.0)