The voice of the verb is distinct from its tense. Don't confuse the passive voice with the past tense. (Sentence 2 happens to be in the past tense, but 3 is not; both 2 and 3 are in the passive voice.

This article was published more than 13 years ago. Some information may no longer be current. George Orwell is not being amused by overzealous attackers of the passive voice. The Associated Press ...

Strunk’s passive voice example My first visit to Boston will always be remembered by me is admittedly awful. The problem, though, isn’t about the sentence being less direct or bold, as he claims.