How often can a project's once-per-round corporation action, such as Mass Driver's, be used?

Question

Accepted Answer

Once per round, however many corporation actions you take that round. You rotate the card after using it, and it resets at the end of the round. Mass Driver acquired in round one can therefore be used up to three times over the game.

Shackleton Base: A Journey to the Moon

How often can a project's once-per-round corporation action, such as Mass Driver's, be used?