Thats not quiet the way I understand it Nev.
The turbo prop routes are regulated and you can not fly RPT in anything on those routes (GEL excepted having provisions for competition).
Jet routes are not regulated so DJ or anybody else can operate into Newman, Karratha ect.
I beleive XR looked at putting the 100 onto the GEL run a few years ago, but that would of become a 'JET' route and therefore opening it to competition.