We have allocated couple of parking spots at company's building, their count is about 40% of employee count. We organized ourselves into groups of 2-3 employees sharing each parking place and we co-ordinate our daily parking withing these small groups. (Occasionally also between these groups.) This works fine.
I have reasons why I am using a car only when really needed (5 times a year, 2% of overall business days) so the other colleagues sharing the spot with me have a benefit of great availability.
Since I am eligible for sharing (6 months by now), I didn't request parking so far (and as indicated I don't intend to use it until it's really needed, few times a year).
For those days (the 2%), if I really need to come and park, I personally expect my request for parking to have priority over the requests of my other 2 colleagues (who use the spot 98% of time).
Is the above justified? And most importantly; how can I ensure I get the parking spot for that 2% of days I really need it?
(The question was edited for higher clarity by Leon who posted the answer and submitted to reopen queue by me. Not sure why it was collecting downvotes, no one has left an explanation.)