Zone of interior (ZI).
Zone of interior (ZI). The United States and its territories and possessions, applicable to areas covered by GSA and where excess property is considered domestic excess. Includes the 50 States, District of Columbia, Puerto Rico, American Samoa, Guam, Northern Mariana Islands, and the U.S. Virgin Islands.
Source
32 CFR § 273.3
Scoping language
Unless otherwise noted, these terms and their definitions are for the purpose of this subpart.