Related Rule
Sri Lanka
Practice Relating to Rule 143. Dissemination of International Humanitarian Law among the Civilian Population
Sri Lanka’s Geneva Conventions Act (2006) reproduces the following from the 1949 Geneva Convention IV:
The High Contracting Parties undertake, in time of peace as in time of war, to disseminate the text of the present Convention as widely as possible in their respective countries, and in particular, to include the study thereof in their programmes of military and, if possible, civil instruction, so that the principles thereof may become known to the entire population.
Any [c]ivilian[,] military, police or other authorities, who in time of war assume responsibilities in respect of protected persons, must possess the text of the Convention and be specially instructed as to its provisions. 
Sri Lanka, Geneva Conventions Act, 2006, Schedule IV: Article 144; see also Schedule III: Article 127.