Parties and Range States
| Title | Status | Status date | CMS Party number | Region |
|---|---|---|---|---|
| Portugal | Party | 1983 | 001 | Europe |
| Qatar | Non-Party | Asia | ||
| Republic of Korea | Non-Party | Asia | ||
| Republic of Moldova | Party | 2001 | 073 | Europe |
| Romania | Party | 1998 | 053 | Europe |
| Russian Federation | Non-Party | AM | Europe | |
| Rwanda | Party | 2005 | 090 | Africa |
| Saint Kitts and Nevis | Non-Party | South & Central America & The Caribbean | ||
| Saint Lucia | Non-Party | South & Central America & The Caribbean | ||
| Saint Vincent and the Grenadines | Non-Party | South & Central America & The Caribbean | ||
| Samoa | Party | 2005 | 093 | Oceania |
| San Marino | Non-Party | AM | Europe | |
| São Tomé and Príncipe | Party | 2001 | 078 | Africa |
| Saudi Arabia | Party | 1991 | 036 | Asia |
| Senegal | Party | 1988 | 027 | Africa |
| Serbia | Party | 2008 | 108 | Europe |
| Seychelles | Party | 2005 | 092 | Africa |
| Sierra Leone | Non-Party | AM | Africa | |
| Singapore | Non-Party | Asia | ||
| Slovakia | Party | 1995 | 045 | Europe |