Bishops stand in succession of the Apostles. They have a lot of responsibility in Christ's Church. Yet, their authority is not unlimited. Some of them need a "good talking to".
For example, those who believe they have the authority to deprive faithful Catholics of the sacraments, such as by "cancelling" all Mass. Another example might be His Excellency, The Most Reverend Reinhold Nann (Peru) who thought he could authorize absolution over the telephone.
This has nothing to do with "Vatican guidance" (other than "your authority is not unlimited"). Calling it "annulled" is appropriate as it was never efficacious.
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