Welch's grape juice - help solve a mystery

[Guest guest]

BTVC and SCD sites say Welch's 100% grape juice in a jar is legal.

First, does jar mean the same as plastic bottle? (glass jar vs.

plastic jar) From the look of their website, Welch doesn't bottle

juice in a glass jar.

Second, the label says grape juice from concentrate:

Ingredients: Grape juice from concentrate (filtered water, grape juice

concentrate), Grape Juice, Ascorbic Acid (Vitamin C). No artificial

flavors or colors added. (Contains natural fruit sugars only.) Made

from Concord Grapes.

I thought any juice from concentrate was a no-no and makes it illegal,

right? Or am I mistaken? Any help clarifying this would be

appreciated. much thanks ~ Mike