Something that's been bothering me.. (underage restriction)

[mellienel2 at yahoo.com]

No: HPFGUIDX 29695

OK - bear with me a moment.

We know that that code for restriction of use of magic by 
underage wizards is in place. But is it a new thing?

Didn't Petunia say every holiday her sister would come home 
turning teacups into rats? And if her sister wasn't allowed to use 
magic over the holidays when they grew up, why wouldn't she 
know that Harry couldn't? She certainly shows no signs that she 
knew inbetween his first and second year.

Think there's anything to the implementation of that rule?

m.