International Law

Res nullius

Reservation

Renunciation

Reparation

Recognition

Regional customary international law

Regional human rights

Ratification

Ratione materiae immunity

Ratione personae immunity

Rebus sic stantibus

Publicist

Public international law

Protective principle

Protocol

Private international law

Prescription

Prescriptive jurisdiction

Presumption of conformity with international law

Pre-emptive self-defence

Piracy; pirated goods

Peremptory norm of international law

Permanent Court of International Justice

Persistent objector