BOI 1999, Greece (Ioannina)
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| Country ↑ | Members | Leaders | Guests | G | S | B | H | Total |
|---|---|---|---|---|---|---|---|---|
 Albania | 4 | 2 | - | - | - | - | - | - |
 Bulgaria | 4 | 2 | - | - | - | 3 | - | 3 |
 Cyprus | 4 | 2 | - | - | - | - | - | - |
| Greece | 5 | 2 | - | - | 1 | 1 | - | 2 |
 North Macedonia | 5 | 2 | 2 | - | - | - | - | - |
 Romania | 4 | 2 | - | 1 | 2 | 1 | - | 4 |
 Türkiye | 4 | 2 | - | 1 | - | 2 | - | 3 |
 Yugoslavia | 6 | 2 | - | - | 2 | 2 | - | 4 |