53. Assessment of package arrays under normal conditions of transport

A number “N” shall be derived such that 5 times “N” shall be subcritical for the arrangement and package conditions that provide the maximum neutron multiplication consistent with the following:

there shall not be anything between the packages, and the package arrangement shall be reflected on all sides by at least 20 cm of water; and

the state of the packages shall be their assessed or demonstrated condition if they had been subjected to the tests specified in paragraph 5 of Section E of the Fourth Schedule.