Practice Relating to Rule 106. Conditions for Prisoner-of-War Status
Poland’s Prisoner of War Handling Procedures (2009) states in the section on definitions:
Prisoner of war
A person captured by the opposing side and belonging to one of the following categories:
6. Inhabitants of non-occupied territory who, on the approach of the enemy, spontaneously take up arms to resist the invading forces, without having had time to form regular armed units, provided they carry arms openly and respect the law and customs of war.