Hi, this solo at 14 rule came 40 years to late for me, I was in the ATC at the age of 13 and was told I could not fly gliders, even though I had swotted up on everything glider related, and could explain how the double pill Cosim variometer worked.
So not detered I left the ATC and took up ACU motor-cycle racing instead. Motor sport has long allowed junior competitors, and I am sure this new rule for gliding will be just the wake-up call that is needed for gliding and GA in the 21st centuary.