Here's the article.
Bishop Gregory on the crux of the issue:
Parents want their children to be properly dressed for Church, but how do they also allow their children to feel comfortable, to feel connected to their peers, and not to develop an aversion to going to Church simply because it always involves a painful encounter over apparel.
To summarize, anything goes. And in conflicts between you and your parents: kids- the Bishop is on your side. Braces and flip flops- bring 'em on. Because that is the problem right? Braces and flip flops.
Strangely enough this public school had no problem setting dress guidelines. I guess they just don't care about the kids' comfort. Which means they just don't care about the kids.