I have a dilemma that you can help me with. I have the option to listen to IRCA Certified ISO 22301: 2012 lead auditor training at Bureau Veritas (they don't have an option for 2019), so I'm interested in how the transition to 2019 would possibly go after that?
Depending upon the training provider, there are two options:
attend an ISO 22301: 2019 transition course, if you are already a certified ISO 22301: 2012 lead auditor, where you will learn about the changes in the standard and how to perform audit considering these changes
attend an ISO 22301: 2019 lead auditor course, where you will perform all the steps to requalify yourself as a lead auditor (i.e., attend the course, execute course activities, and take the final exam).
Please note that, due to the number of changes in the new ISO 22301:2019, this qualification is not very important if you want to work as a consultant, but this is very important if you want to work as an auditor.
These articles will provide you a further explanation about ISO 22301:2019: