That would be a matter that would have to be agreed to by all the members.
There's also leeway that can be taken by governments and negotiators. The United States negotiators, as is generally the case in negotiations, use leaks strategically. They are much more open about what their demands are, and in a sense are less preoccupied with secrecy when it doesn't suit their purposes.
Canada could play that game more, but I think what would be more preferable, of course, would be an agreement to open up the process to outside scrutiny. I think you're invariably going to have better outcomes.
These texts are not easily understood or accessible. They need to be explained by negotiators. Negotiators need to have a few things explained to them, for example, from public health experts and legal experts who are outside the formal consultative process and outside of the negotiating room.