TLM doesn’t change canon law.
Although many people who consider themselves “traditional” and attend the TLM fast much longer (the traditional midnight-fast) and cover their heads if female, it is not MANDATORY (but it isn’t bad, either ;)).
Many might let out a gasp, but the TLM (I’ve got only one TLM in my reach, only once a week), usually nobody covers the head (well, of you count the biretta of the priest, one…). The priests are from the FSSP would have said something if it was mandatory, I suppose
But imagine what that means when the motu comes into effect… female altar servers, for example, are allowed if the priest who is to celebrate the mass doesn’t object … TLM with altar girls? Hm. Possible. A lot of things will change with the motu, I suppose.