Back Handspring Ups to extended level, as shown in the video below, are first legal in Level 4. In Level 3 you can neither release from an inverted position (L3 Stunts I2) nor release to an extended position (L3 Stunts I3), but both of these restrictions are loosened in Level 4. Level 4 allows release moves from an inverted position (L4 Stunts I2) and release moves to extended position from waist level or below (L4 Stunts I4), therefore Back Handspring Ups to extended position are allowed in Level 4. Please keep in mind release moves to extended level may not twist in Level 4, so please don’t perform a twisting variation of the skill in the video.
Note – The information in this article is based on the August 27, 2015 release of the rules.