Verifying shipping zones for orders

When entering orders, the following rules determine which zone table is used:

• A country is defined for the Ship to address - The zone table used is the one for which the Ship Method and Country combination matches an order's Ship to address Country and Shipping Method.
• A country is not defined for the Ship to address - The zone table used is the one for which the Ship Method matches an order's Shipping Method. The zone table has a blank Country field.

After the correct zone table has been determined, the following rules determine whether the Default Zone defined in that zone table is used:

• The Ship to address:
• Does not specify a postal code, or
• Specifies a postal code that does not match any of the entries in the Table list for the zone table.
• The Ship to address of an order specifies a postal code, but the Table list for the zone table does not contain any entries.