There are a lot of updates to the rules of golf this year. If you’ve been watching the LPGA or PGA you may have already seen some of these in action. After a long time of making sure I was dropping at shoulder height I think dropping at knee height will be a tough adjustment for me.
The USGA has a summary of the changes on their website. It is 7.5 pages but I think it does a good job going over what has changed. Hope you find it helpful!