word | | Legal system |
| compulsory | Romania | based on civil law system; has not accepted compulsory ICJ jurisdiction |
| compulsory | Russia | based on civil law system; judicial review of legislative acts; has not accepted compulsory ICJ jurisdiction |
| compulsory | Rwanda | based on German and Belgian civil law systems and customary law; judicial review of legislative acts in the Supreme Court; has not accepted compulsory ICJ jurisdiction |
| compulsory | Saint Kitts and Nevis | based on English common law; has not accepted compulsory ICJ jurisdiction |
| compulsory | Saint Lucia | based on English common law; has not accepted compulsory ICJ jurisdiction |
| compulsory | Saint Vincent and the Grenadines | based on English common law; has not accepted compulsory ICJ jurisdiction |
| compulsory | Samoa | based on English common law and local customs; judicial review of legislative acts with respect to fundamental rights of the citizen; has not accepted compulsory ICJ jurisdiction |
| compulsory | San Marino | based on civil law system with Italian law influences; has not accepted compulsory ICJ jurisdiction |
| compulsory | Sao Tome and Principe | based on Portuguese legal system and customary law; has not accepted compulsory ICJ jurisdiction |
| compulsory | Saudi Arabia | based on Sharia law, several secular codes have been introduced; commercial disputes handled by special committees; has not accepted compulsory ICJ jurisdiction |
| compulsory | Senegal | based on French civil law system; judicial review of legislative acts in Constitutional Court; the Council of State audits the government's accounting office; accepts compulsory ICJ jurisdiction with reservations |
| compulsory | Seychelles | based on English common law, French civil law, and customary law; has not accepted compulsory ICJ jurisdiction |
| compulsory | Sierra Leone | based on English law and customary laws indigenous to local tribes; has not accepted compulsory ICJ jurisdiction |