What are the two ways to use the unless tense?

A: There are two ways to use the unless tense:

Bad weather never stops me. I jog every day. I jog every day unless the weather is bad.

He never wears a uniform and doesn't look like a policeman. He doesn't look like a policeman unless he wears a police uniform. (When the subject of an Unless clause is the same as that of the main clause, the subject and verb after Unless can sometimes be omitted).