Related Rule
Ukraine
Practice Relating to Rule 106. Conditions for Prisoner-of-War Status
Ukraine’s IHL Manual (2004) states:
Combatants are obliged to distinguish themselves from the civilian population while they are engaged in an attack (or in a military operation preparatory to an attack), at least by carrying their arms openly.
If a combatant falls into the power of an adverse party, he shall be entitled to the status of a prisoner of war. 
Ukraine, Manual on the Application of IHL Rules, Ministry of Defence, 11 September 2004, § 1.2.22.
Ukraine’s IHL Manual (2004) states that prisoner-of-war status is provided to, among others:
Inhabitants of a 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 themselves into regular armed units (provided they carry arms openly and respect the rules of international humanitarian law). 
Ukraine, Manual on the Application of IHL Rules, Ministry of Defence, 11 September 2004, § 1.2.31.