Section 15(3)(iv) in The Static and Mobile Pressure Vessels (Unfired) Rules, 2016
(iv)inner supports between the inner vessel and the outer vessel shall be of non-inflammable materials and capable of supporting the inner vessel together with the maximum allowable cryogenic liquid. The supports shall be able to withstand expansion or contraction within the operating temperature range. Cryogenic pressure vessels meant for transport purpose, shall be able to withstand maximum static loading of all the following individually -