Yes, they should. And you can provide that in the act. My private member's bill talked about the need to declare whether this was going to be binding or non-binding.
What actually took place in 1992 on the Charlottetown Accord, under the Canada Referendum Act, was in fact a non-binding vote, although everybody called it a referendum. When the results came in, it was as if it had been a referendum. It was that very night that Prime Minister Mulroney said, “The Charlottetown Accord is history.”