Соответствующая норма
German Democratic Republic
Practice Relating to Rule 146. Reprisals against Protected Persons
At the CDDH, in its explanations of vote on Article 46 of draft Additional Protocol I (which became Article 51), the representative of the German Democratic Republic stated that his delegation
gave particular support to paragraph 4 [which became paragraph 6 of Article 51 of the 1977 Additional Protocol I], which contained a clear prohibition on attacks against the civilian population or civilians by way of reprisals. That prohibition, he was convinced, had the same importance, and was of the same absolute nature, as the prohibition of reprisals against prisoners of war, the wounded and the sick, which were already contained in the Geneva Conventions. His delegation would therefore regard any reservation on the prohibition as incompatible with the humanitarian object and purpose of the Protocol. 
German Democratic Republic, Statement at the CDDH, Official Records, Vol. VI, CDDH/SR.41, 26 May 1977, p. 167, § 137.