The 834 loop 2310 includes an N3 segment with a max use of 2. Please identify a situation where a second N3 segment would be applicable. How can a single city state and zip be associated with four address lines?
The additional N3 segment allows for additional address lines if needed. Additional lines could be necessary in foreign addresses or to assist in guiding to the appropriate office. If the address does not support the additional lines it is not necessary.