I don't know. I frankly don't know. The Information Commissioner may know.
Up until the recent amendment to the act, one could not qualify any of the requests as vexatious. The federal court of appeal had long ago declared that the motive of the requester is immaterial. Regardless of his motive or the frequency of it, you had to respond.
That has been disciplined from the last time the act was amended. I think it can be disciplined more, for the benefit of the user community that uses it for a practical, honourable purpose, by having a fee. That's my approach to it.