The complete sentence in 74 was:
Each train must operate on a legal route.
A legal route consists of a continuous unbranched length of track, including a City containing the Corporation’s station token (not a Hotel!), not necessarily at the beginning or end of the route.
In order to score revenue, the route must also contain one or more other Off-Map Areas, Cities (which may contain additional station tokens of the Corporation) or (except for 3E-Trains) Towns.
I understood that the player need at least to things:
a)the city containing the Corporation's station and:
b1)other Off-Map areas
My doubt was: could be possible only with the station and b1?
And the answer was yes. Thanks.
Sorry, but to play for the first time (avoiding any confusion in the middle of the game), and for my translation to Spanish, I prefer to be 100% sure.