This is just in response to Mr. Scarpaleggia's concern that anyone who'd been designated a vexatious complainant would not have the ability to make further complaints.
I think it's actually quite clearly laid out in proposed section 91.2:
An offender who has been designated as a vexatious complainant shall, when submitting a new complaint or grievance,
—which means they are completely allowed to—
provide the institutional head with additional material, as required by the institutional head, to establish the merits of his or her complaint or grievance.
It just means that this would be an extra step that they would have to take. They would still be able to make complaints even after being designated a vexatious complainant, correct?