VixTD, on 2015-September-30, 11:39, said:
I was wondering whether South should be concerned that he knows North is under constraints from UI, and so could well have something in reserve for his raise to 4♠. It certainly shouldn't be a "sporting" raise. Is that knowledge authorized?
No, it's not authorised, because of the final clause of Law 16A1(a). The knowledge that North must have his bid is affected by the unauthorized information that South gave to North.