It doesn't imply anything. It states what states for the dates and shoots listed. Whether any specific agency has more requirements is up to them. The risk is that you use their likeness in a way they don't like or weren't expecting.
Point being, you might as well get the thing properly detailed for the most rigorous agency you might try and work with. Why do anything less and find your self with a batch of images you can't submit? You don't need to use the standard Getty release, you could work with a 70's edition release that would stand up in a court of law but...
