They are closing the consciences objector loophole.
At the moment you don't get childcare rebates if your dc aren't vaccinated unless you fill the form.
When I put my dd in childcare I wasn't entitled to,the rebate as she had not had the chicken pox vaccine. She'd had the chicken pox though so I didn't get her vaccinated and I filled in the form. It was a bit of a hoo haa though and it still comes up from time to time.
When there is an outbreak of anything at school I get a letter to tell me to keep her off.