I think it's of limited comfort.
When this kind of provision was being negotiated as part of the TPP—indeed, they're similar provisions, although this one is even more limited, as I mentioned—a U.S. group, Public Citizen, did a study on the kind of comfort that the public interest exception provides. They took a look specifically at WTO cases where that language was used. They found, I believe, in 43 out of 44 cases that attempts to use public interest as the exception were defeated.