Related Rule
Netherlands
Practice Relating to Rule 131. Treatment of Displaced Persons
The Military Manual (2005) of the Netherlands states:
In addition to refugees, displaced persons are identified as those forced to leave their home surroundings, for example, due to hostilities or through natural disaster. They are in the territory of their own country. Although displaced persons are not officially refugees, they should be treated as protected persons. 
Netherlands, Humanitair Oorlogsrecht: Handleiding, Voorschift No. 27-412, Koninklijke Landmacht, Militair Juridische Dienst, 2005, p. 130.
[emphasis in original]
In its chapter on peace operations, the manual states:
Refugees and displaced persons merit special attention from a peace force, since they form a vulnerable group. The humanitarian law of war also makes reference to them as “protected persons”. 
Netherlands, Humanitair Oorlogsrecht: Handleiding, Voorschift No. 27-412, Koninklijke Landmacht, Militair Juridische Dienst, 2005, § 1229.