Related Rule
Practice Relating to Rule 42. Works and Installations Containing Dangerous Forces
Zimbabwe’s Code of Conduct for Combatants (1993), under the heading “Distinctive signs” and in a section on “Dams, dykes, nuclear power plants”, shows a sign consisting of a group of three bright orange circles placed on the same axis and states: “Respect … objects marked with such signs.” 
Zimbabwe, Code of Conduct for Combatants, Joint publication of the Zimbabwe Defence Forces and the International Committee of the Red Cross Regional Delegation in Harare, 1993, p. 12.
Zimbabwe’s Geneva Conventions Act (1981), as amended in 1996, punishes “any person, whatever his nationality, who, whether in or outside Zimbabwe, commits any such grave breach of … [the 1977 Additional Protocol I]”. 
Zimbabwe, Geneva Conventions Act, 1981, as amended in 1996, Section 3(1).
The Report on the Practice of Zimbabwe considers the prohibition on attacks against works and installations containing dangerous forces to be part of customary international law. 
Report on the Practice of Zimbabwe, 1998, Chapter 1.8.