You can combine junior and senior level competitions pretty freely (i.e. do JGP/GP + Euros + Jr & Sr Worlds), but you can't do both JGP and GP in the same season. I think this rule has been in place for a while now, if not even since the start of the JGP.

Or does anyone know of a skater that did both in the same season?
Also,
entries for JGP Czech Skate are out:
No Singles entries for either Ireland or Great Britain. One British pair and one British Ice Dance couple:
Lucy HAY / Kyle MCLEOD (Reigning Advanced Novice Champions in Pairs) and of course
Phebe BEKKER / James HERNANDEZ (Reigning Junior Champs in Ice Dance).