TWAS is correct about the casual player being able to be registered with a minimal financial commitment. The club already had insurance and had the ability to allow per-game payments or whatever means they thought of. This removes that option.
As far as the insurance, what is covered and how well it is acted upon, I can say I saw four examples of juniors having to use it last year. The insurance covered all quite well. If anything, it was the response from NSWRU/Country that slowed them down.
In all of those cases, it was suspected spinal injuries requiring ambulance and medical clearance. One required repeated specialist follow-up and all were sorted after some paperwork anguish.