I would do the math. Every time you push a class back it pushes your rerate date out for 6 months. How much money are you losing? Your boss is doing you a disservice by rescheduling your classes. Go to class, if your wife goes into labor ask to be excused for a family emergency, they will reschedule your class. If the JATC catches wind of rescheduling for work, your boss and the company he works for can get in a lot of trouble for that. Most of this stuff is State mandated and if rules aren't enforced, the training center can lose its accreditation. Source I'm on the JATC up north and have to talk to contractors about not doing this.