"Harald, the question for you is, do you have pictures of how and where the hips are supposed to be placed? You could send them to me? I love to see them, thank you."
My response: S------h, It's not a matter of where, it's dynamic always moving, it's not one place if you know or have learned the right movements you can adjust your hips based on all needs, snow conditions, steepness, terrain, and type of turn. The misconception about skiing that has been perpetrated comes from PSIA and USSA coaching, and these concepts have been misleading skies, instructors, and coaches for decades.
There is no such thing as an "athletic position" either. Everything should be fluid, dynamic, and always moving. You can't learn that by focusing on one "position" If you try to do this you will be frustrated and never achieve dynamic or balanced skiing. The way to learn and apply fore/aft balance is through movements as with all the "Essentials" of Skiing." (Author: Harald R. Harb, published 2006) PSIA teaches positions, and PMTS teaches balance and dynamic skiing, there is a huge difference between these methods.