Or they should have exemption policies for cultural sensitive sacred items brought onboard much like cremated remains are handled. This is not the first time they have encountered bringing headdresses onboard.

"Air Canada understands the importance of accommodating customers with items and symbols of sacred cultural significance, and in the past the chiefs have been able to travel while transporting their headdresses in the cabin," the statement said."
https://www.cbc.ca/amp/1.7185649