Règle correspondante
Practice Relating to Rule 155. Defence of Superior Orders
At the CDDH, Mexico stated that it would abstain from the vote on Article 77 of the draft Additional Protocol I “because it considered that Article 77 should apply not merely to grave breaches, but to all breaches”. 
Mexico, Statement at the CDDH, Official Records, Vol. VI, CDDH/SR.45, 30 May 1977, p. 308, § 7.