I think this depends on more than just "are bear cannisters required or not". Are bears much of a concern where you're going? How about rodents? I.e., what exactly are you most concerned about getting at your food?
For me the answer varies between cannister, ursack, ursack minor, occasionally hanging just a silnylon bag, and sleeping with my food, all depending on the situation and in some cases based on the fears, rules, or normal process of others that I'm hiking with.