Special Keycard over Preempts

When partner opens any Preempt from 2Diamond thru 3Spade (except 3Club) we play that 4Club is Special Keycard

When Partner preempts 3Club we play 4Club as extending the Preempt and 4Diamond as Special Keycard

Responses to Special Keycard are:

Special Keycard is on over Interference so long as it is a jump. If we cannot jump then 4NT becomes Special Keycard.