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  1. Make the remote call
  2. Check to make sure the result is not null. If it is, a system error occurred.
  3. Check CityStateZip .validZip flag. If false, the zip was invalid. Also, if false, examine the CityStateZip .error property. If it contains anything, a system error occurred.
  4. If zip was valid, city and state will be populated and may be used.

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