Finally, Article 130 took away basic civil rights of members of the clergy: priests and religious were prevented from wearing their habits, were denied the right to vote, and were not permitted to comment on public affairs in the press. Most of the anti-clerical provisions of the constitution were removed in 1998.
That answers a qustion I have had. I knew about the prohibition of clerical dress in public because my church had a nun who went to work in Mexico in 1966. The ladies' guild gave her a "shower" to provide her with street clothes, a wig, and simple jewelry so that she could serve in Mexico. Yet, my pastor, who vacations in Mexico annually, seems to have never heard of this rule (circa 2012) because I've asked him about it. I knew the rule was still in place in the 1970s because we were living in TX at that time and the priest who served in our parish did extensive missionary work in Mexico.
After JPII visited Mexico in 1979 the rules were relaxed, but prior to that no clerical grab was allowed in public. I heard this from a Polish priest I met in Mexico in 1985, though he was not wearing clerics when in public.