Related Rule
Australia
Practice Relating to Rule 15. The Principle of Precautions in Attack
Section A. Constant care to spare the civilian population, civilians and civilian objects
Australia’s Defence Force Manual (1994) states: “In the conduct of military operations, constant care must be taken to spare the civilian population and civilian objects to the maximum extent possible.” 
Australia, Manual on Law of Armed Conflict, Australian Defence Force Publication, Operations Series, ADFP 37 – Interim Edition, 1994, § 556.
Australia’s LOAC Manual (2006) states that “in the conduct of military operations, constant care must be taken to spare the civilian population and civilian objects to the maximum extent possible.” 
Australia, The Manual of the Law of Armed Conflict, Australian Defence Doctrine Publication 06.4, Australian Defence Headquarters, 11 May 2006, § 5.61; see also §§ 6.26 and 8.50.
The LOAC Manual (2006) replaces both the Defence Force Manual (1994) and the Commanders’ Guide (1994).
In 2009, in a ministerial statement before the House of Representatives on the situation in Sri Lanka, Australia’s Minister for Foreign Affairs stated: “Australia calls on all those involved in the fighting to make protecting civilians an absolute priority … All parties must ensure that civilians can leave the conflict zone safely.” 
Australia, House of Representatives, Minister for Foreign Affairs, Ministerial statement: Situation in Sri Lanka, Hansard, 5 February 2009, p. 623.