No - there is no limit now as far as I am aware - school quite happy training - just you can't go solo till you have medical, SPL, ARN, ASIC or AVID. Unfortunately as mentioned they will not accept the application forms for SPL/ASIC till 3 weeks prior to birthday. John has now started on his post-solo lessons awaiting arrival of the piece of paper. Of course he would never have touched the controls of an aircraft before he started officially learning
The one thing CASA is VERY efficient at is receipt of money - my card was debited the day they got the application !!
Although, to be fair, I finally got my new aircraft sorted out and emailed the transfer documents - got the new rego certificate within a week.