I think this amendment is fairly clear in what it's intending to do. So, with respect to the possession of cetaceans, it would make clear that, yes, the cetaceans that are born, but that had already been conceived before the coming into force, would be grandfathered in. I also think that there is a way to interpret the grandfathering clause so that it could include the unborn cetaceans as well, but this would be clearer.
On April 2nd, 2019. See this statement in context.