Todd and Ellie, thanks for confirming. This was my understanding also but as I have always been on a Non B myself, I just wanted to post and offer them some piece of mind. Appreciate your help as always ☺️
I tried to use the right terminology but sometimes people make mistakes. They already had a visa extension in-country which is why they are doing a border bounce.
I should have been clearer - CMX does require this, I just wasn't sure if I had to report to immigration in person or if it's okay for my condo to register a new TM30 upon return.