Here is a link to a website for a Jetski Racing Development Program in NZ.
http://www.jetblacks.co.nz/

Obviously Juniors can race R/A's in NZ, but by the sounds of it they have some great young riders over there, including a 15yo female rider, Shana Hemopo, who has been matching it with Kylie Elmers & most of the guys.

Also Holdin Stockman, son of Jeff Stockman, who at 18 has acheived more than most of the experienced riders in OZ, including a World Title at 16 in Novice Stock RA & last year won the Expert Elite Stock RA & 2nd in Pro Stock RA.