On 30th July, the online Customary IHL Database of the International Committee of the Red Cross (ICRC) was updated with State practice from nine countries, as well as practice from the International Criminal Tribunal for Rwanda and the International Criminal Tribunal for the former Yugoslavia. The section on Treaties and Other Instruments (Sections I and II respectively) of the Database have also been updated.

Practice up until the end of 2010 for the following countries is included in the most recent update: Bangladesh, Ireland, Nigeria, Peru, Sri Lanka, the United States of America and Zimbabwe. Guinea's practice up until the end of 2011 has also been incorporated, as well as Malaysia's practice up until the end of 2012. The source material, which was gathered by ICRC delegations and a number of National Red Cross and Red Crescent Societies, was then analysed and processed by a team of British Red Cross researchers based at the Lauterpacht Centre in close collaboration with the ICRC.

The aim of the Customary IHL Project is to provide up-to-date, accurate, extensive and geographically diverse information in the field of international humanitarian law (IHL) and to make this information readily accessible to practitioners and researchers. The project is a joint undertaking of the British Red Cross and the ICRC, and updates the practice section of the ICRC's 2005 study on customary IHL which was originally published by Cambridge University Press.

The new practice is marked in green throughout the Database. The practice on the Database, including the new practice, relates to situations of armed conflict and associated matters regulated by IHL.

The formation of customary law is an on-going process. For this reason, practice is updated regularly to support the customary rules identified, monitor their potential evolution and assess the extent to which they enhance the protection for victims of armed conflict, whether by confirming or supplementing treaty-based rules.