'Tain't ex cathedra, so it ain't official infallible Church doctrine. It's just the Curia trying to regain some of the authority it lost to Vatican II. The 71 page document refers to other practices as well -- and it originally excluded liturgical dancing until someone wised up and realized that the Pope had enjoyed liturgical dancing during a trip to Africa.

I wouldn't worry about it. The Catholics in the US, by and large, aren't going to.