It does not do that either.
It does not say that the tribunal “must give the evidence minimal weight”; it says that the tribunal
“must, in considering it, have regard to the principle that minimal weight should be given to the evidence”.
The tribunal is perfectly entitled to say, “Well, we’ve looked at that principle. Actually, we’re not going to apply it here”—for reasons A, B and C. There is no requirement and no fettering of the tribunal; there is no compulsion that the evidence be given minimal weight. What the decision-maker has to do is have regard to the principle that minimal weight should be given to any late evidence unless there are good reasons why it is provided late.