If you are interested in a canon lawyer's opinion that veiling is still obligatory under canon law:http://stlouiscatholic.blogspot.com/2008/12/truth-unvieled-head-covering-still.html
Sorry for the double post. I just found your blog. I read through your canon law sections and the article I posted above, rebuts the common but mistaken opinion that veiling is now optional. It is worth a careful read. If you follow the discussion on my blog, even Patrick Madrid admitted that it convinced him.Of course, the vast majority of Catholics are unaware of this requirement, so I do not speak to subjective culpability, or that anyone who doesn't veil is sinning. Far from it; like you, my goal is to get the word out and spread the practice. Yet the truth of the canon law situation needs to get out.