Entrepreneur donates island

It’s nice to read that an entrepreneur has donated an island in the Back River to the Nature Conservancy of Canada but there’s one line in the CBC piece that made me wonder: ” ‘I trust my children; I’m sure they’ll protect the island. But what happens after my children [are] gone?’ Vikström said in an interview.” So, has the island really been donated, or is it contingent on what this man’s kids decide to do after he’s gone?