What do you want from the prerequisite?
Sorry but a college degree doesn't prove anything of value to me. If you want to hire smarter people, make the test harder. You want better educators, make public speaking part of the test or training.
My point is, what do you want out of the prerequisites?
Right now I can explain how every perquisite our FD has directly impacts the position. We do not require a degree but do recognize it monetarily.
I've worked with plenty of guys with and without degrees, some are better than others, but the degree rarely is the tipping point. And AS degrees in Fire Science? Unless it's one of a few great schools: Next to useless. In the time spent going to school, a new firefighter can learn the same information with practical application and gain experience to boot.
I'm not against degrees, just show me what you think you'll gain. I'd still rather have guys with GED's, some mechanical aptitude and a work ethic than most of the college grad FFer's I've seen in recent years.