This IWA will be developed in a completely digital process. Before the first workshop, a couple of preparatory web meetings will be held to give information regarding the process. Also, an initial analysis will be performed and circulated to registered participants by end of July 2020. We will use the summer to collect initial input, which will help us prepare for the first workshop and in developing a first draft text. Between the workshops there will be commenting via correspondence, complemented by one or more web meeting(s). The first IWA workshop is scheduled for 14-16 October, and the second workshop is scheduled for 14-16 December 2020. After the final workshop, the text will be edited and published. The published IWA can then be purchased via national standards bodies.