Free Weekend Ticket - 2 one-way?

I received a "Free Weekend Ticket" promo ticket which will allow a single Weekend Roundtrip on BART.

I would like to, rather than a round trip on one single day as implied, use the ticket as two one-way trips on different weekends.

Anyone know if this will work, or will the ticket be keyed to the specific station and/or specific day on the first use?