Whether they will scale back their orders to pre-2003 levels or stop doing business with us altogether depends on whether the changes that their management has proposed will be fully implemented.

Whether they scale back their orders to pre-2003 levels or whether they discontinue their business with us altogether depends on the changes their management has proposed, if fully implemented or not.

Their either scaling back their orders in the future to pre-2003 levels, or their outright termination of business with us, depends on their management's proposed changes being fully implemented or not.

Whether they will scale back their orders to pre-2003 levels or stop doing business with us altogether depends if the changes that their management has proposed become fully implemented.

They will either scale back their orders to pre-2003 levels, or they will stop doing business with us altogether dependent on whether the changes their management has proposed will be fully implemented, or not.