FASCINATING!!  I have not yet read this article, but the synopsis is fabulous.

“For purposes of this Article, we treat de-extinction, in some form, as a scientifically reasonable future prospect whose legal implications should be considered in a practical manner. For the most part, we assume that if de-extinction can feasibly be accomplished, someone will undertake the effort if for no other reason than because it would be irresistibly thrilling to do so.”

http://journals.law.stanford.edu/stanford-environmental-law-journal-selj/print/volume-33/number-1/how-permit-your-mammoth-some-legal-implications-de-extinction