Treaties, States Parties and Commentaries
Treaties and Documents
Geneva Conventions of 1949 and Additional Protocols, and their Commentaries
Historical Treaties and Documents
The Laws of War on Land. Oxford, 9 September 1880.
Part II : Application of general principles #IV. Persons interned in neutral territory - Art. 80.
Art. 80. The interned may be kept in camps or even confined in fortresses or other places.
The neutral State decides whether officers can be left at liberty on parole by taking an engagement not to leave the neutral territory without permission.