Соответствующая норма
German Democratic Republic
Practice Relating to Rule 147. Reprisals against Protected Objects
At the CDDH, during discussions on amendments made by other States concerning the prohibition of reprisals against civilian objects, the German Democratic Republic stated that it “supported … the amendments concerning reprisals”. 
German Democratic Republic, Statement at the CDDH, Official Records, Vol. XIV, CDDH/III/SR.16, 10 February 1975, p. 130, § 19.