This is Call to Action people reporting this, so that's why I have a question mark.
From The Arizona Republic:
Bishop Thomas Gumbleton of Detroit must seek permission from local bishops anywhere he wishes to speak, by order of the papal nuncio, the Vatican's ambassador to the United States, according to local leaders of Call to Action. The group has taken a variety of positions at odds with church policy.
Normally, Catholic clergy need permission only to conduct religious services. The Vatican has penalized dissident theologians in the past, but Robert Blair Kaiser, a Phoenix author who has covered the Vatican since 1962, said he had never heard of a nuncio restricting a bishop. advertisement