181. The following shipments shall require approval of the NRRC or, if it involves international transboundary movement, multilateral approval:
(a) the shipment of a Type B(M) package not conforming with the requirement as specified in paragraph (5) of the Second Schedule or designed to allow controlled intermittent venting;
(b) the shipment of a Type B(M) package containing radioactive material or nuclear material whose activity is greater than 3 x 103 A1 or 3 x 103 A2, as appropriate, or 1000 terabecquerels (TBq), whichever is the lower;
(c) the shipment of packages containing fissile materials if the sum of the criticality safety indexes of the packages in a single freight container or in a single conveyance exceeds 50. Excluded from this requirement shall be shipments by seagoing vessels, if the sum of the criticality safety indexes does not exceed 50 for any hold, compartment or defined deck area and the distance of 6 m between groups of packages or overpacks as required in Table IV of the Sixteenth Schedule is met;
(d) the shipments by a special use vessel; and
(e) the shipment of SCO-III
182. For the purpose of Article 181 (d), the radiation protection program for the shipment shall require the approval of the NRRC or, if it involves international transboundary movement, multilateral approval.