1. Mexico had refused to permit such limited duty-free imports , citing fears of smuggling. 2. Government officials signed an order Monday authorizing the duty-free imports , to begin this year. 3. Tariff free imports had been offered to Ecuador in exchange for drug elimination efforts. 4. The Polish government also approved duty-free imports of equipment from Russia to build the pipeline. 5. The system allows only a trickle of duty-free imports and otherwise imposes tariffs reaching 300 percent. 6. Imported car sales to China plummeted last year after the government abolished tax-free imports for foreign-funded enterprises. 7. The end of duty-free imports is likely to be balanced by other tariff-rate changes, officials have said. 8. Now, faced with a flood of duty-free imports from Iran, he can only charge 1, 000 dinars. 9. But a total of about 200 organizations, including veterans groups and the handicapped, still enjoy duty-free import privileges. 10. The tax was necessary, he said, because duty-free imports by multinational corporations put local companies at a disadvantage.