7.—(1) Before a consignor of radioactive material consigns—
(a)radioactive material contained in an overpack, a container, a wagon or a tank;
(b)a package;
(c)unpackaged LSA-I; or
(d)unpackaged SCO-I,
he shall determine the transport index for the overpack, the container, the wagon, the tank, the package, the unpackaged LSA-I or the unpackaged SCO-I, as the case may be, in accordance with the procedure contained in RID sub-paragraph 2.2.7.6.1.
(2) In this regulation, “transport index” means a number which is—
(a)used to provide control over radiation exposure; and
(b)assigned to a package, an overpack, a wagon, a tank or a container, or unpackaged LSA-I or SCO-I.