Is BART parking hours enforced strictly?

I parked my vehicle at Millbrae BART garage and then took the train to SFO. But unfortunately my return flight got delayed by couple hours. Now, it is moved to a new calendar date (12:30 AM) instead of the 10:30 PM original time. I had booking until 11:59 PM.

Should I purchase a single day parking for this extra time? Will BART enforce parking hours this strictly or they’re a bit lenient before towing a car? How does it work?

Does anyone have any relevant experience or tips? Please share.