I'm not sure if this has been posted before, but I acquired this 'Points to Consider' about what a Dub is willing to accept or not accept when it comes to blood. As per usual, it appears that they've purposely made this very confusing and they're speaking out both sides of their mouth. On page 1, it seems one of the options is using your own blood: "...During the course of a surgical operation, I accept all medical procedures involving the use of my own blood except..."
To me, this gives the definite impression that you could store your own blood for use in an operation right? Nope. On the second page, under the "Sample" 5 it says "I refuse to predonate and store my blood for later infusion."
So if you're still not allowed to use your own blood, then why would they say on page one that you can "accept all medical procedures involving the use of [your] own blood?"