Geoffrey Taucer posted A Brief Explanation of Levels in USA Gymnastics.
It’s a nice summary, MAG and WAG Junior Olympics as well as mention of the easier WAG PREP-OP divisions in his region.
In the USA Gymnastics Junior Olympic program, there are set rules throughout the country for each level.
For the lower levels (2-6 for girls and 4-7 for boys), there are specific routines set by USAG, so every kid in the country will be doing the same routines at these levels (though the boys program allows certain bonus skills to be performed in some of the compulsory routines for a couple extra tenths).
For the upper levels (7-10 girls, 8-10 for boys), gymnasts have their own individual routines. For girls, these levels still have very specific requirements, while the boys’ upper-levels are much more open-ended. …
read it on his Apex Gymnastics Club blog – A Brief Explanation of Levels in USA Gymnastics
Gymnastics Coaching.com 