From what I understand, "consent" is an uncountable noun when it refers to the agreement of all of the members regarding specific matters, and it is countable when it refers to a documentation of approval.
I just want to make sure that I am understanding the nuance of the word correctly. So, if there is a sentence like this:
The entire procedure should be under a legally binding consent.
It means the procedure should be abided and supervised by the legal documentation which provides consent/approval. On the other hand, the following sentence,
The entire procedure should be under legally binding consent.
has a connotation that the procedure will require legal consent or approval of all of related people.
Am I correctly understanding the nuance of the word "consent"? you are welcome to revise my question/thread if you find my writing to be unclear or grammatically wrong.