That also means ANYTIME the mtr is changed the title has to be updated also..
Yep, it's a profit center for the DMV.

Back in the 60's, CA also used engine number, or at least required a visit to DMV if you swapped an engine. I ran into that when I licensed my first Model A. It hadn't been on the road, but DMV insisted that I needed to notify them within 10 days of an engine swap, even though the car hadn't been licensed or on the road for a number of years. They wanted charge me a penalty because I hadn't done that within their prescribed timeframe. Somehow magically, after that first unsuccessful visit to DMV for a license with the new engine number, the engine had JUST been swapped. Then I was able to get the registration and license.

What Jerry said.

The power is in their hands.