I assume that they mean that the journo was working without accreditation (which is pretty easy to get).
You have to email email@example.com with a letter of assignment. Then when you arrive bring in the letter of assignment (on letterhead), a copy of your passport, a copy of your visa and two passport photos to the foreign press office in Maspiro (got to the entrance and the security guy will call up for you).
Sometimes they might tell you that you need a letter from your embassy stating that you are a journalist, but that’s not a huge issue as the embassies are very used to doing this and most of them have a form letter that they will dash out.
Oh and make sure you address things to Mr Gamal Abdel Fatah, General Manager of the Press Center.
And you can call- Eslam Essam Ayoub with questions +20149509596 or his boss Fouad +20127636966
Oh and sometimes they want things in triplicate. Not sure why.