Practice relating to Rule 66. Non-Hostile Contacts between the Parties to the Conflict
Italy’s IHL Manual (1991) notes that specific agreements to be executed on the battlefield may be concluded by parlementaires.
Italy’s LOAC Elementary Rules Manual (1991) provides:
Local interruptions of combat and other arrangements can be concluded between opposing forces. At lower levels, such arrangements can be very simple and concluded orally: voice, radio, bearer of a white flag (flag of truce). At higher levels and for longer lasting interruptions of combat, written agreements shall be concluded.