Return which suit at trick three?

[VixTD]

Their lead agreement was described as "the lower the spot card, the better the holding in the suit". Nothing about whether they want the suit returned, it seems like it's just intended to help partner judge where your values are.

 

Admittedly, sometimes you may violate your agreements in order to induce partner to defend differently. E.g. if you normally lead K from KQ, but want partner to overtake with his ace you might lead Q.

I didn't ask NS about this, but it did occur to me, and I assumed that they would deviate if necessary from the description given just as anyone else playing any other methods would.