Hi David,
you can find the 2018 EURCJ version of entry rules, was called “superlight”.
http://2018.robocupjunior.eu/wp-content/uploads/2018/02/SuperLight-EN.pdf
This year we made some small adjustments (move to 9V supply) but I have no EN version.
Anyway the ideas is a LW with some limitations.
The main limitation is that only 2 motion motors must be used, cause omni movement is difficult to implement for the first experience team. You can join this category only once.
We don’t used small field, cause we assumed that school already have the big one, and mentors use this league as preparatory, or as first experience.
If you have questions I’m glad to discuss.