| Code | Description | Eligible Country or Group |
| A |
Generalized System of Preferences (GSP) (duty-free treatment) |
GSP2013 |
| A+ |
Only imports from least-developed beneficiary developing countries eligible for GSP under that subheading (duty-free treatment) |
GSP2013_LEAST_DEV |
| AU |
Australia Special Rate |
Australia |
| B |
Automotive Products Trade Act (APTA) (duty-free treatment) |
Canada |
| BH |
Bahrain Special Rate |
Bahrain |
| C |
Agreement on Trade in Civil Aircraft (duty-free treatment) |
NTR (MFN) |
| CA |
NAFTA for Canada (duty-free treatment) |
Canada |
| CL |
Chile Special Rate |
Chile |
| CO |
Columbia Special Rate |
Columbia |
| D |
Africa Growth and Opportunity Act (AGOA) (duty-free treatment) |
AGOA2013 |
| E |
Caribbean Basin Initiative (CBI) |
CBERA |
| IL |
Israel Special Rate (duty-free treatment) |
Israel |
| J |
Andean Trade Preference Act (ATPA) |
ATPA |
| J+ |
Andean Trade Promotion and Drug Eradication Act (ATPDEA) |
ATPA |
| JO |
Jordan Special Rate |
Jordan |
| K |
Agreement on Trade in Pharmaceutical Products (duty-free treatment); |
NTR (MFN) |
| KR |
Korea Special Rate |
Korea |
| L |
Uruguay Round Concessions on Intermediate Chemicals for Dyes (duty-free treatment) |
NTR (MFN) |
| MA |
Morocco Special Rate |
Morocco |
| MX |
NAFTA for Mexico |
Mexico |
| OM |
Oman Special Rate |
Oman |
| P |
Dominican Republic- Central America Free Trade Agreement (DR-CAFTA) |
CAFTA + Dom. Rep. |
| P+ |
Dominican Republic- Central America Free Trade Agreement Plus (DR-CAFTA Plus) |
CAFTA + Dom. Rep. |
| PA |
Panama Special Rate |
Panama |
| PE |
Peru Special Rate |
Peru |
| R |
Caribbean Basin Trade Partnership Act (CBTPA) |
CBTPA |
| SG |
Singapore Special Rate |
Singapore |
