Usually it isn't an exclusive list, more of an inclusive list. I mean they list what is allowable and it need to be on the list. For example for Yosemite: https://www.nps.gov/yose/planyourvisit/containers.htm
What is odd is Bearikade is on that but only the Weekender and up? I wonder why not the Scout?

Similar list for Olympics https://www.nps.gov/olym/planyourvis...-canisters.htm except note at the bottom Ursack is specifically banned.

Bear Resistant Canisters - NYS Dept. of Environmental Conservation "

• Non-rigid containers or sacks are not considered bear resistant canisters under the regulation."