I asked about this two or three times before release because of these kinds of statements, and I never got an answer.
There is nothing that says a Junker cannot land his pirate train (the largest ship he is allowed by his ID) on lawful bases (except lawful kusari bases).
I would be pretty annoyed if this got changed, since I asked about this a couple of times before buying my pirate train, and now own a pirate train on my junker, with largely unlawful, but some other places involved (IMG and zoner bases, that sort of thing. Maybe even lawful planets for semi-dirty goods (stuff like small arms, tobacco, blood diamonds in the houses they're not illegal)