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External Data Source

Source

Regular Expression
^(GB)?(\ )?[0-9]\d{2}(\ )?[0-9]\d{3}(\ )?(0[0-9]|[1-8][0-9]|9[0-6])(\ )?([0-9]\d{2})?|(GB)?(\ )?GD(\ )?([0-4][0-9][0-9])|(GB)?(\ )?HA(\ )?([5-9][0-9][0-9])$