@ahmadnasriya thanks so much for your help. Though I found a way around it, more of a hack really.
I was able to create verification or T&Cs agreement members page that writes a value to the collection “agreed” string. Once the item is created the submit button is disabled if the “_owner” field matches the current logged in user.
Now all fields for the available to be used.
Always more than one way to skin a cat 