def add_level2_advice_addendum(xml, options = {})
        if (level2 = options[:level_2_data])
          xml.tag! :AMEXTranAdvAddn1, byte_limit(level2[:advice_addendum_1], 40) if level2[:advice_addendum_1]
          xml.tag! :AMEXTranAdvAddn2, byte_limit(level2[:advice_addendum_2], 40) if level2[:advice_addendum_2]
          xml.tag! :AMEXTranAdvAddn3, byte_limit(level2[:advice_addendum_3], 40) if level2[:advice_addendum_3]