This hand is purely hypothetical, but I bring it up to ask a rules question.
Its a pair event and South plays in 2♥. E/W are silent in the bidding.
West (unfortunately) leads the ♣5, 2, A, 3.
East goes into a 2 minute tank, and worried about dummy's clubs, shifts to the spade Queen, King, Ace, 6.
West is now in possession of UI and chooses to shift to a diamond. Declarer is able to pitch one diamond on the long club, but hooks the heart into West who cashes the ♦. Making 3.
A spade back at T3 likely results in 170 for N/S.
My question is - as declarer, when is the proper time to call the director?
1. As soon as the ♠Q hits the table after the tank?
2. As soon as West finds the ♦ shift?
3. After the hand is over?
I have my opinion, but I wanted to ask the rules mavens here. Thanks in advance.

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