Practice Relating to Rule 102. Individual Criminal Responsibility
Switzerland’s Basic Military Manual (1987) states: “No one shall be punished for an act he did not personally commit.”
In 2010, in its Report on IHL and Current Armed Conflicts, Switzerland’s Federal Council stated:
3.4 [Increasing use] of anti-guerrilla tactics
Apart from the direct fight against insurgents, international humanitarian law also addresses other anti-guerrilla tactics. … If members of militias or opposition groups fall into the hands of the government they benefit from the protection of art. 75 of [the 1977] Additional Protocol I as well as that of art. 3 common to the  Geneva Conventions.
[footnotes in original omitted]