Norma relacionada
Practice Relating to Rule 106. Conditions for Prisoner-of-War Status
Section C. Situations where combatants cannot distinguish themselves
At the CDDH, Brazil voted against Article 42 of the draft Additional Protocol I (now Article 44) in Committee III because
the provisions relating to identification of combatants were not sufficiently clear to ensure that the civilian population would be protected from the inevitable risks when it was not possible to identify unmistakably those engaged in military activities. 
Brazil, Statement at the CDDH, Official Records, Vol. XV, CDDH/III/SR.56, 22 April 1977, p. 185, § 80.
In the final vote in plenary session, Brazil abstained but gave no additional explanation.