The ladies head must be lower than her knee. The detailed description of levels and positions required is in this document http://www.usfigureskating.org/conte...id%20Pairs.pdf. Here's an excerpt:
Originally Posted by antmanb
Lady’s “low position”:
- for inside Death Spirals the lowest hip or buttock and head should not be higher than her skating knee;
- for outside Death Spirals head should not be higher than her skating knee and bodyline between knee of skating leg and head should be flat or shallow arch.
Man’s “low pivot position”: buttocks not higher than the knee of the pivot foot. The Level of a death spiral without one full revolution in the described Man’s and Lady’s simultaneous position can not be more than 1. Any part of the Death Spiral with a higher Lady’s or Man’s position is not valid for Level features 3) and 4).
Lady not in the prescribed position
If Lady’s head and/or lowest hip is (are) higher then skating leg knee, the Level cannot be more then 1. If during the Death Spiral Lady’s head never reaches the level of her skating knee, the Death Spiral will have no value.