Related Rule
Netherlands
Practice Relating to Rule 64. Conclusion of an Agreement to Suspend Combat with the Intention of Attacking by Surprise the Adversary Relying on It
The Military Handbook (1995) of the Netherlands provides that it is prohibited “to violate an agreement concluded with the adverse party (for example concerning a cease-fire to search for and collect the wounded and dead)”. 
Netherlands, Handboek Militair, Ministerie van Defensie, 1995, p. 7-40.
Under the Definition of War Crimes Decree (1946) of the Netherlands, the “commission, contrary to the conditions of a truce, of hostile acts or the incitement thereto” constitutes a war crime. 
Netherlands, Definition of War Crimes Decree, 1946, Article 1.