18.—(1) A person shall not cause or permit to be carried any radioactive material in a freight container, tank container, tank wagon or wagon unless the freight container, tank container, tank wagon or wagon concerned—
(a)is suitable for the purpose, having regard to—
(i)the nature and circumstances of the journey to be undertaken, and
(ii)the hazardous properties and quantity of the radioactive material and any other goods to be carried with it; and
(b)has been adequately maintained.
(2) A train operator shall not cause or permit to be carried any radioactive material in a freight container, tank container, tank wagon or wagon unless he has taken all reasonable steps to ensure that paragraph (1) has been complied with.