Buyers not responding on time? Order them to ‘perform’

We recently talked about the agonizing wait that sellers are in for when they finally reach an agreement with qualified buyers and enter escrow.
The buyers have 21 days to remove all of their contingencies, in writing. Until day 21, the buyers can cancel the contract for just about any reasonable reason, their deposit is returned, and the sellers have to start all over.
Once the final contingency has been removed, in writing, the buyers can either, (1) choose to cancel the contract, in writing,