1♣ Natural.
2♦ South alerted after having had a little thought. It is obvious that South thought North had Majors
At West's turn to bid, Double would have been take-out. Pass is not forcing.
I Asked 3 strong players what they would have bid with West's cards. They did not give same answers, but all were certain that N/S had a misunderstanding, 2♦ for Majors are common in Iceland.
N/S Convention card showed that 2♦ bid was weak in ♦
West did not ask N/S about the bidding. Based on the Alert and the 3♥ bid, West knew what was going on in South's mind and would have got the explainatin of Majors on the 2♦ bid if he had asked.
I did not find it strange that West did not ask about the N/S bidding, and therefore West did not loose any rights by not asking.
Ruling...
There is no way to determine what the contract would have been and result, if the 2♦ had been explained correctly.
I ruled 3 IMP's to E/W team based on Law 75B and 12C2a and 12C2b.
N/S appealed. The Appeal committie confirmed the ruling.