This is from the most recent ISU communication:
IV. LEVELS OF DIFFICULTY, SINGLE SKATING
Number of features for Levels: 2 for Level 2, 3 for Level 3, 4 for Level 4All Spins
1) A difficult variation in a basic or (for spin combinations only) in an intermediate position
2) Another difficult variation in a basic position which must be significantly different from
the first one and:
● spin in one position with change of foot – on different foot than the first one
● spin combination without change of foot – in different position than the first one
● spin combination with change of foot – on different foot and in different position than the
first one
3) Change of foot executed by jump
4) Backward entrance/Difficult variation of flying entrance/Landing on the same foot as
take-off or changing foot on landing in a Flying Sit Spin
5) Clear change of edge in sit (only from backward inside to forward outside), camel,
Layback and Biellmann position
6) All 3 basic positions on both feet
7) Both directions immediately following each other in sit or camel spin
At least 8 rev. without changes in pos./variation, foot or edge (camel, difficult sit, layback,
difficult upright), counts once per spin
Additional features for the Layback spin:
9) One clear change of position backwards-sideways or reverse, at least 3 rev. in each
position (counts also if the Layback spin is a part of any other spin)
10) Biellmann position after Layback spin (SP – after 8 revolutions in layback spin)
Backward and flying entry, change of edge and any type of difficult spin variation count as
features that can increase the Level only once per program (in the first spin they are
attempted).
For Spin Combinations with change of foot all 3 basic positions are mandatory for
Levels 2 – 4 in both Short Program and Free Skating.
For Spins with change of foot at least one basic position on each foot is mandatory for
Levels 2 – 4 in Free Skating. In case this requirement is not fulfilled in Short Program,
the spin will have no Level and consequently no value.
In any spin with change of foot the maximum number of features attained on one foot
is two (2).
It's not the easiest to decode. However, note that the clear change of edge is a level "bullet" - that's one that our spin coach has been working on with our skaters quite aggressively.