Related Rule
United States of America
Practice Relating to Rule 42. Works and Installations Containing Dangerous Forces
Section B. Placement of military objectives near works and installations containing dangerous forces
In 1991, in response to an ICRC memorandum on the applicability of IHL in the Gulf region, the US Department of the Army stated: “Military objectives may not be placed in proximity to structures containing ‘dangerous forces’ in order to shield those military objectives from attack.” 
United States, Letter from the Department of the Army to the legal adviser of the US Army forces deployed in the Gulf region, 11 January 1991, § 8(Q), Report on US Practice, 1997, Chapter 1.9.