In the First Vatican Council, Chapter 3 (On Faith) #8 it says:
Wherefore, by Divine and Catholic faith all those things are to be believed which are contained in the Word of God as found in Scripture and Tradition, and which are proposed by the Church as matters to be believed as divinely revealed, whether by her solemn judgment or in her ordinary and universal Magisterium.
Obviously women’s head covering at prayer and during prophesy is mandated by St. Paul in Scripture (1 Corinthians ch. 11) and it is the Tradition of the Church that such is done for women praying in public…which makes it an article of faith.
The First Vatican Council, under Canons (4. On Faith and Reason) #3 states:
- If anyone says that it is possible that at some time, given the advancement of knowledge, a sense may be assigned to the dogmas propounded by the Church which is different from that which the Church has understood and understands: let him be anathema.
And so in the performance of Our Supreme Pastoral Office, We beseech for the love of Jesus Christ and We command, by the authority of Him Who is also our God and Saviour, all faithful Christians, especially those in authority or who have the duty of teaching, that they contribute their zeal and labour to the warding off and elimination of these errors from the Church and to the spreading of the light of the pure faith.
So, once it is an article of faith, it is always an article of faith. Simply because some women, starting in the 1960’s, were disobedient to Canon Law, and this matter of faith, does not remove it from Tradition. Also, the fact that the 1983 Canon Law does not mention it, does not remove for women the necessity of wearing the head covering for public prayer.