We are publishing a number of documents emanating from the 23rd ICC Congress: reports that were discussed and ratified (or extracts from them) and resolutions that were adopted. This now includes an article on the overall work of the Congress and the report on the historic course with a short introduction. We add to this collection a report aimed at updating our analysis of decomposition which was ratified by the 22nd ICC Congress and which provides a framework for some of the reports to the 23rd Congress.