El Salvador, Costa Rica, Nicaragua, Panama and Honduras created the ATL version of the OTL Central American Bank for Economic Integration and the Central American Common Market at the signing of the ATL 1957.0 Colón Treaty in Colón, Panama.
| Nation. | Year of joining. | Year of leaving. |
|---|---|---|
| El Salvador | 1957 | - |
| Costa Rica | " | - |
| Nicaragua | " | - |
| Panama | " | - |
| Honduras | " | - |
| Guatamala | 1969 | - |
| Dominican Rep | 1972 | - |
| Beleize | 1972 | - |
| Colombia | 1974 | - |
| Jamacia | 1975 | - |
| Cuba | 1997 | - |
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