Singapore legislation
Regulation 6
of Radiation Protection (Transport of Radioactive Materials) Regulations
Regulation 6
Limits on transport index and criticality safety index
Subregulation 1
Except for consignments under exclusive use, the transport index of any individual package or overpack shall not exceed 10, nor should the criticality safety index of any package or overpack exceed 50.
Subregulation 2
Packages of fissile material for which the criticality safety index exceeds 0 shall not be carried in an overpack.
Subregulation 3
Packages of fissile material for which the criticality safety index is 0 and packages of non-fissile radioactive material may be combined together in an overpack for transport, provided that each package contained therein meets the applicable requirements of these Regulations.