Singapore legislation
Regulation 7
of Radiation Protection (Transport of Radioactive Materials) Regulations
Regulation 7
Categories of packages and overpacks
Packages and overpacks shall be assigned to either category I‑WHITE, II-YELLOW or III-YELLOW in accordance with the conditions specified in Table 5 of the Third Schedule where applicable, and with the following requirements:
for a package, both the transport index and the surface radiation level conditions shall be taken into account in determining the appropriate category;
where the transport index satisfies the condition for one category but the surface radiation level satisfies the condition for a different category, the package shall be assigned to the higher category of the two; and for this purpose, category I-WHITE shall be regarded as the lowest category;
a package transported under special arrangement shall be assigned to category III-YELLOW; and
an overpack which contains packages transported under special arrangement shall be assigned to category III‑YELLOW.