4. The exemptions granted in paragraph 3 of this
Article shall apply only to cases involving the importation of articles exempted at the time of entry and shall not be construed as obligating the Republic of Panama to reimburse customs duties and domestic taxes collected by the Republic of Panama in connection with purchases of goods from Panamanian sources subsequent to their importation.
5. Customs inspections shall not be made in the following cases:
(a) United States citizen employees travelling on official business who enter or depart from the Republic of Panama;
(b) official documents under official seal, and
mail sent through the military postal channels of the United States;
(c) Cargo consigned to the Commission..
6. Property imported under this Article and subsequently transferred to a person who is not entitled to dutyfree importation shall be subject to the payment of import duties and other taxes according to the laws and regulations of the Republic of Panama.
7. All property imported into the Republic of Pan free of customs duties and other taxes pursuant to paragraphs 2 and 3 of this Article may be exported free of customs duties, export permits, export taxes, and other assessments. All property acquired in the Republic of Panama by, or in the name of, the Commission, or acquired by United States citizen employees or dependents for their private use, may be exported free of customs duties, export licenses, and other export taxes or charges.

TIAS 10a31