A.
UN 3363 Dangerous Goods in Apparatus or Dangerous Goods in Machinery specifies the use of PI 962.

PI 962 states that a ?gstrong outer packaging?h must be used. A strong outer packaging means such packaging that will sustain the size and weight of the contents during the entire phase of transportation.

The strength of the packaging must be such that it will safely contain the contents commensurate with its size and its weight. If a fibreboard box is used, the fibreboard must use either a 2-layer or 3-layer board strong enough to hold the contents. The contents must not exceed 0.5L for liquids, 1.0kg for solids and 1.0kgs of gas (only Div. 2.2). Several of such packagings May be overpacked. Mar ings required for overpacks must be applied.