17. The NRRC shall authorize the use of a non-conforming package in case the following requirements are met:
(a) in the opinion of the NRRC, conformity with the relevant requirements of this Specific Regulation and other relevant NRRC Regulation is impracticable; and
(b) suitable measures to compensate for the known or the anticipated non-conformities are available and the NRRC believes that the overall level of safety and security in transport and in stowage is at least equivalent to that which would have been provided if all the relevant requirements of this Specific Regulation and other relevant NRRC Regulation had been met.