How would you approach an instructor that does not comply with accommodations set in place at the school? If an instructor states that students will not be given accommodations because it is "special" treatment, how would we help them understand the dynamics involved?

I recently added a calendar to the handouts I give to students the first day of class. It was very helpful in giving the student a clearer picture of what is expected but I felt I did not have as much flexibility to focus on students specific interests and discussion. I have evaluated my calendar and will be changing some things to make it more flexible without giving up the explicit explanation of expectations. I could always use some suggestions with this however.