Nothing. The House could set that down in its procedural rules, or in its code attached to the Standing Orders, that with regard to committee reports, draft reports, they shall be this or they shall be that. You're right, this could be regulated in that fashion. Then, if this is infracted, it's not treated so much as a breach of privilege, it's treated as a procedural irregularity, and the House could then choose to impose some discipline on members who don't respect that rule. It's the House that has control of its procedure.
I'm just saying that in the absence of a procedural rule, put into the Standing Orders that you can't mess around with members as freely as you might like in a given case. For example, you couldn't take this case and go after the member without having the support of some well-established rule that the member would have.... I mean, privilege is well established, but it's not of a nature of a procedural rule that, if breached, could give rise to discipline.