아래의 약자들은 SPI(Special Program Indicator)라고 하는데 미국과 특별한 관세혜택 조약을 가지고 있는 국가, 지역 또는 그 이외에 미국 국내법에 의하여 특혜관세혜택을 받을 수 있는 지역을 표시합니다.
- A+ Least Developed Country under the Generalized System of Preferences
- AU United States-Australia Free Trade Agreement
- B Automotive Products Trade Act
- BH United States-Bahrain Free Trade Agreement Implementation Act
- CA Goods of Canada, under the North American Free Trade Agreement
- CL United States-Chile Free Trade Agreement
- CO United States-Colombia Trade Promotion Agreement Implementation Act
- D African Growth and Opportunity Act
- E Caribbean Basin Economic Recovery Act
- IL United States-Israel Free Trade Area
- JO United States-Jordan Free Trade Area Implementation Act
- KR United States-Korea Free Trade Agreement Implementation Act
- MA United States-Morocco Free Trade Agreement Implementation Act
- MX Goods of Mexico, under the North American Free Trade Agreement
- OM United States-Oman Free Trade Agreement Implementation Act
- P Agreement on Trade in Pharmaceutical Products
- PA United States-Panama Trade Promotion Agreement Implementation Act
- PE United States-Peru Trade Promotion Agreement Implementation Act
- SG United States-Singapore Free Trade Agreement
