| 23 May 1939 |
1 July 1940 |
Universal Postal Convention, with Final Protocol, Regulations of Execution and Provisions concerning the Transportation of Regular Mails by Air, with Final Protocol. |
| 23 May 1939 |
|
Convention and Final Protocol regarding the Universal Postal Union (with Regulations and Airmail Provisions) |
| 5 July 1947 |
1 July 1948 |
Universal Postal Convention [With Final Protocol and Annex, and Provisions for Letters by Air Mail and Final Protocol to Provisions] |
| 5 July 1947 |
1 July 1948 |
Agreement concerning Insured Letters and Boxes [With Final Protocol] |
| 5 July 1947 |
1 July 1948 |
Arrangement, with Final Protocol. Regulations and Forms, concerning Postal Parcels, including Dispositions, Final Protocol and Annex concerning Postal Parcels by Air Mail |