It doesn't say so on the requirement list I have, but things can change.
Keep in mind many brokers want you to do (or to have done) everything they can possibly think of that may be required (such as a caveat registering the option on title or having a market rent appraisal from the outset of the option), and they try to claim CMHC won't approve the deal without it. However, none of my clients have registered caveats and they get approved without hassle through my banker.
Perhaps these brokers figure they will demand you submit everything just in case it is required because they don't want to risk the mortgage being declined. This plan backfires when the client cannot provide all the items on the list. The result is there are a lot of brokers scaring RTO clients by saying the deal can't be done, and making people think they "made the worst mistake of their lives by getting into an RTO."