Related Rule
Netherlands
Practice Relating to Rule 63. Use of Flags or Military Emblems, Insignia or Uniforms of Neutral or Other States Not Party to the Conflict
The Military Manual (1993) of the Netherlands states: “In an armed conflict, it is prohibited to make use of the flags, military emblems, uniforms and insignia of States which are not parties to the conflict.” 
Netherlands, Toepassing Humanitair Oorlogsrecht, Voorschift No. 27-412/1, Koninklijke Landmacht, Ministerie van Defensie, 1993, p. IV-3.
The Military Handbook (1995) of the Netherlands provides that it is prohibited “to use insignia and uniforms … of neutral States”. 
Netherlands, Handboek Militair, Ministerie van Defensie, 1995, p. 7-40.
The Military Manual (2005) of the Netherlands states: “In an armed conflict, it is forbidden to use flags, military emblems, uniforms and distinguishing signs of States which are not parties to the conflict.” 
Netherlands, Humanitair Oorlogsrecht: Handleiding, Voorschift No. 27-412, Koninklijke Landmacht, Militair Juridische Dienst, 2005, § 0417.
In its chapter on non-international armed conflict, the manual states: “It is also prohibited to make use of the flags, military emblems, uniforms and distinctive signs of States that are not parties to the conflict.” 
Netherlands, Humanitair Oorlogsrecht: Handleiding, Voorschift No. 27-412, Koninklijke Landmacht, Militair Juridische Dienst, 2005, § 1041.