What is the requirement for skaters' feet while performing a Change of Edge feature?

The requirement for skaters' feet while performing a Change of Edge feature is that they must change edges after achieving the Death Spiral (DS) position. This means that the execution of the Change of Edge must occur after the skaters have established the necessary position within the element, which demonstrates the technical control and transition involved in the move.

This requirement ensures that the skaters are able to effectively show the transition between edges, which is a critical component of the feature. Successfully changing edges at this point allows the skaters to showcase their precision, balance, and the fluidity of their movement, essential in synchronized skating.

The focus on changing edges post-DS position emphasizes the importance of timing and technique, aligning with the judging criteria that assess how well athletes execute this particular skill. The other options reflect misunderstandings of the specific criteria needed for a proper Change of Edge execution in synchro skating.