Taxation of shipping profits: annual no-objection certificates allowed after DTAA verification and international traffic undertaking. Assessing Officers may issue an annual No Objection Certificate, valid for one year, after verifying applicability of the DTAA provisions that allocate taxation of shipping profits to the resident state and confirming the non-resident shipping enterprise is engaged in international traffic; an undertaking must be obtained from the non-resident that none of its ships will operate in traffic other than international traffic during the NOC's currency.