word | | Legal system |
| open | Venezuela | open, adversarial court system; has not accepted compulsory ICJ jurisdiction |
| operations | Antarctica | ... these meetings are carried out by these member nations (with respect to their own nationals and operations) in accordance with their own national laws; more generally, access to the Antarctic Treaty area ... |
| opinions | Norway | mixture of customary law, civil law system, and common law traditions; Supreme Court renders advisory opinions to legislature when asked; accepts compulsory ICJ jurisdiction with reservations |
| oral | Honduras | ... Roman and Spanish civil law with increasing influence of English common law; recent judicial reforms include abandoning Napoleonic legal codes in favor of the oral adversarial system; accepts ICJ jurisdiction with reservations |
| ordinances | Norfolk Island | based on the laws of Australia, local ordinances and acts; English common law applies in matters not covered by either Australian or Norfolk Island law |
| Organization | Moldova | ... civil law system; Constitutional Court reviews legality of legislative acts and governmental decisions; accepts many UN and Organization for Security and Cooperation in Europe (OSCE) documents; has not accepted compulsory ICJ jurisdiction |
| Organization | Slovakia | ... Hungarian codes; accepts compulsory ICJ jurisdiction with reservations; legal code modified to comply with the obligations of Organization on Security and Cooperation in Europe (OSCE) and to expunge Marxist-Leninist legal theory |
| organizations | Antarctica | ... known as Antarctic Treaty Consultative Meetings - which include consultative member nations, non-consultative member nations, observer organizations, and expert organizations; decisions from these meetings are carried out by these member nations (with ... |
| organs | China | ... Soviet and continental civil code legal principles; legislature retains power to interpret statutes; constitution ambiguous on judicial review of legislation; party organs exercise authority over judiciary; has not accepted compulsory ICJ jurisdiction |
| origin | Austria | civil law system with Roman law origin; judicial review of legislative acts by the Constitutional Court; separate administrative and civil/penal supreme courts; accepts compulsory ICJ jurisdiction |