Scoring at the international level is regulated by the code of points. This system was significantly overhauled for 2006. Under the new code of points, there are two different panels judging each routine, evaluating different aspects of the performance. The D score covers difficulty value, element group requirements, and connection value; the E score covers execution, composition and artistry. The most visible change to the code was the abandonment of the "perfect 10" for an open-ended scoring system for difficulty (the D score). The E score is still limited to a maximum of 10. The sum of the two provides a gymnast's total score for the routine. Theoretically this means scores could be infinite, although average marks for routines in major competitions in 2016 generally stayed in the mid-teens.