Company wants me to promise I’ll work for them this fall

https://imgur.com/gallery/urtJ3Qb Found this in my paperwork this morning. I understand there isn't as much call for school busses in the summer, but I still have bills to pay. (There's work around the depot, some charters, some year-round schools.) If they're not going to employ me over the summer, I'll have to take another job. Depending on pay, insurance, hours, maybe I won't want to come back. It's bad enough they expect drivers to work a split shift (5-9am, 2-6pm, not paid between). That's essentially 13 hours per day, paid for 8. And not enough time between to do another job.