Parking rule may be tightening. They have just finished booking a lot of cars. In designated areas only. About 5 of these. Areas sometimes taken over for constructions.
Nobody checks bikes for stickers.
You can get in with a friendly wave to the gatekeepers. But you will be booked if you park outside of the designated areas. Situation Parking stickers provided free of charge. Parking rule seems lax. All are central to the main areas of the campus.