The article mentioned that his licence (aka certificate) didn't allow him to fly into certain airports / controlled airspace, however it stopped short at alleging that he actually did. We're still in the dark until we hear the charges.
Edit: Interestingly reading further you only have to have been issued a part 61 license and have done a flight review but there is no requirement to have a valid medical....
I'm guessing this doesn't happen very often.