Parking spaces on campus are limited, no matter how large a space there is for cars to park in. This makes the slots inside the protected area of any campus coveted and sought after by any number of staff, teachers and students. Younger drivers can compete for these spaces when they get their formal basic license after they hit the sixteen year old minimum age limit.
It will depend on any campus regulation whether all the slots are open to all or if there are allotted spaces for older drivers and students. The high school parking permit may also be based on a reward system for younger drivers. While teachers and staff could all be accommodated by the school and have their own individual parking spaces.
However fair is fair here as in most things in which there is some sort of competitive qualification. All may apply when they can and they may be served on a first come, first serve basis. So the earlier you apply for one, the more chances you have of getting the permit, a document which can help take care of your car, or helps you have less worries about it.
Some neighborhoods are not good to park in even within the surrounding school areas. There may be gangs or car thieves roaming the streets outside of a campus, or traffic enforcers may ticket a car illegally parked by a curbside. The commercial parking lots will cost, while the ones inside a campus are protected and come free of charge.
It is a no brainer then that people will prefer the permit over any kind of facility for parking cars. For students, good behavior can be an added qualification with the parking slot as incentive. Schools take care of their students in many ways, and none more intensively than for those who are already driving their own vehicles to school.
Again, whatever the size of the campus grounds are, and no matter how many slots there are for vehicles, the tendency usually runs towards limited and competitive slots. There are simply too many folks who have their own vehicles. So this permit is something of a special item, and it can even be a tradable item for some.
Competition is simply a matter of applying to one beforehand. The permit may come in the form of a document or ID, or perhaps a sticker or decal made out officially to allow authorized persons to enter the school with a vehicle and park on a designated spot. The systems in place often has limited time period for a document, probably a semester or school year.
Thus the slots will become open for application at the beginning of each semester or year. It allows others to enjoy the privilege, and luck, for systems that are fair to all, will be the only judge as to who gets to receive this privilege. The schools are not in the business for providing this, although the spaces are ones which provide an added incentive to anyone.