Related Rule
Netherlands
Practice Relating to Rule 6. Civilians’ Loss of Protection from Attack
Section B. Presence of combatants among the civilian population
The Military Manual (1992) of the Netherlands contains a rule identical to Article 50(3) of the 1977 Additional Protocol I. 
Netherlands, Interim Law of Armed Conflict Manual, DM 112, New Zealand Defence Force, Headquarters, Directorate of Legal Services, Wellington, November 1992, p. V-2.
The Military Manual (2005) of the Netherlands states: “The presence within the civilian population of individuals who do not come within the definition of civilians does not deprive the population of its civilian character.” 
Netherlands, Humanitair Oorlogsrecht: Handleiding, Voorschift No. 27-412, Koninklijke Landmacht, Militair Juridische Dienst, 2005, § 0506; see also § 0805 (protection of the civilian population).