The RFU have created a slide deck for the Law and Regulation changes for the 2019/20 season. The changes will have an impact on match officials and consequently their interaction/discussions with coaches and players at the start of the season. The intention of the slide deck is to support members with their pre-season preparations.
The RFU has been supported by World Rugby who provided their presentations. You will note that for the high-tackle decision making framework there are a number of timings on the slides, these relate to the World Rugby video which is the best resource available.