I'm missing something here.
If this document is not an agreement, then what is it's purpose?
Are there two parties agreeing a course of action?
The document says two opposing things in order to appease two different parties:
1. Medical staff will provide treatment that may include a blood transfusion.
2. [The parents] signature is not an agreement for blood transfusions.
So the parents signature will allow a blood transfusion to occur, even if the parent is not in agreement with it.
This lets a JW parent save the life of their child while insulating themselves from WT sanctions afterwards.
By signing the form the parent is agreeing to the conditions set out on the form.