Part I : General principles - Art. 2.
Art. 2. The armed force of a State includes:
1. The army properly so called, including the militia;
2. The national guards, landsturm, free corps, and other bodies which fulfil the three following conditions:
(a) That they are under the direction of a responsible chief;
(b) That they must have a uniform, or a fixed distinctive emblem recognizable at a distance, and worn by individuals composing such corps;
(c) That they carry arms openly;
3. The crews of men-of-war and other military boats;
4. The inhabitants of non-occupied territory, who, on the approach of the enemy, take up arms spontaneously and openly to resist the invading troops, even if they have not had time to organize themselves.