Absolutely true. "unless they specifically waive those rights" - if archiving entailed contacting the owner with a legal archive request, we would have archived

Absolutely true. "unless they specifically waive those rights" - if archiving entailed contacting the owner with a legal archive request, we would have archived basically nothing. Luckily there are exceptions for Internet Archive in place. My point is, if "by consent" was the requirement to archive information, we would have archived nothing.