Related Rule
New Zealand
Practice relating to Rule 66. Non-Hostile Contacts between the Parties to the Conflict
Section B. Use of the white flag of truce
New Zealand’s Military Manual (1992) provides: “The wish to negotiate by parlementaires is frequently indicated by the raising of a white flag … Parlementaires normally operate under a flag of truce.” 
New Zealand, Interim Law of Armed Conflict Manual, DM 112, New Zealand Defence Force, Headquarters, Directorate of Legal Services, Wellington, November 1992, § 406(1) and (2).
The manual adds that the white flag is deployed:
1. When a person is authorised by one Party to enter into communications with the adverse Party; if used, the white flag should be carried by the parlementaire or an accompanying individual so as to be clearly visible.
2. If an element of the armed forces wishes to surrender to an adverse Party a white flag, when held so as to be clearly visible, may be utilized to facilitate a peaceful surrender. 
New Zealand, Interim Law of Armed Conflict Manual, DM 112, New Zealand Defence Force, Headquarters, Directorate of Legal Services, Wellington, November 1992, Annex B, § B44.