相关规则
German Democratic Republic
Practice Relating to Rule 14. Proportionality in Attack
At the CDDH, the German Democratic Republic stated that it considered:
Protection of the civilian population could not be improved if the concept of proportionality was retained. To permit attacks against the civilian population and civilian objects if such attacks had military advantages was tantamount to making civilian protection dependent on subjective decisions taken by a single person, namely, the military commander. 
German Democratic Republic, Statement at the CDDH, Official Records, Vol. XIV, CDDH/III/SR.7, 18 March 1974, p. 56, § 48.