I've been doing this NBE thing for years and only recently learned about pelvic tilt. 
I was very skeptical at first but no longer.
One clue is losing an inch, or so, of your height.

You will also walk differently.
Try walking with a very relaxed pelvis. You can even do this standing in place.
Example, as soon as you pick up your left foot, relax your spine and let the left side of you pelvis drop as far as it will go.
Then when you pick up your right foot, let that hip drop.
You may have to exaggerate it at first to get feel for it but once you get it going you will find the sweet spot.
It really feels good to walk like this. More relaxing and it seems easier on the hips and knees too.