Moderns think that everything must be or is regulated by law, but they're wrong.
In Rome it's different and in fact much more fun: here there's custom (which is unwritten law). And, too, there are many splendid liturgical perogatives in the Diocese of Rome. Anywho it's all harmless: buckled shoes and tassels from the old days never hurt anybody! Like grandma always said: "Don't count pennies."
But, when you special order your fascia with tassels, make note of the two seperate styles here: one is a point reaching the tassel while the other is the round reaching the tassel. Take note as you have to tell them how you want it when you place the order (as per Don Juan).