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External Data Source

Source

Regular Expression
[0-9]{2}-?[DF][A-Z]{2}-?[0-9]{1}|[DF][A-Z]{1}-?[0-9]{3}-?[A-Z]{1}|[DF]-?[0-9]{3}-?[A-Z]{2}|[DF][A-Z]{2}-?[0-9]{2}-?[A-Z]{1}$