An L/C permits partial shipments but the beneficiary, under cover of one invoice for the total L/C value, presents 3 sets of B/L showing the same vessel/voyage/destination but different loadport and on board dates. Which on board date is to be taken into consideration for the purpose of checking regarding late presentation?

  (1)( ) the first date

  (2)( ) the last date

  (3)( ) the middle date