In my remarks, I suggested a couple of things, such as “associated with” or “attributed to”. The other wording in my remarks would put the onus in part on the requester to demonstrate affinity with the items being requested.
There are all kinds of ways in which this becomes quite important in a repatriation discussion, not least because requests for repatriation for the same items or from the same geographical area may originate from multiple first nations. It is in part historical research and in part oral tradition and traditional knowledge that help determine what those connections are, but relationship to the material being requested is a key criterion in adjudicating any repatriation request. In the absence of that specificity, any regime that tries to make a determination will fall on hard times.