I'm guessing you're wanting to hook into the same spot where NOTIFY_ADMIN_CUSTOMERS_B4_ADDRESS_UPDATE is triggered in v1.5.6?
Ref: https://github.com/zencart/zencart/pull/1534/files
If so may as well add that specific line to your current code, to make your eventual upgrade a little easier.
As for making the Admin load and run the observer class, what was the fatal error you got in your last post?
You *do* want your observer classes to "extends base".
Bookmarks