We have to declare on our annual registration form for our local association. They just ask for schools that we MIGHT have a conflict with, and what reason the conflict may exist. I always declare the school where my cousin is the Dean of Students as off-limits, especially for girls basketball since he's the head coach. So basically, that leaves it up to the assignor to decide if the conflict of interest is enough to warrant my not working any games for that school.

As for the state association, if you apply to work for the post-season, we have to list any schools that we might have a conflict with, including: the school we graduated from, schools where our immediate relatives are students, or where we have relatives working in that school. I understand immediate relatives to include cousins and nieces and nephews, as well as aunts and uncles.