49 CFR § 173.475 - Quality control requirements prior to each shipment of Class 7 (radioactive) materials.
(a) The packaging is proper for the contents to be shipped;
(b) The packaging is in unimpaired physical condition, except for superficial marks;
(d) For fissile material, each moderator and neutron absorber, if required, is present and in proper condition;
(e) Each special instruction for filling, closing, and preparation of the packaging for shipment has been followed;
(g) Each packaging containing liquid in excess of an A2 quantity and intended for air shipment has been tested to show that it will not leak under an ambient atmospheric pressure of not more than 25 kPa, absolute (3.6 psia). The test must be conducted on the entire containment system, or on any receptacle or vessel within the containment system, to determine compliance with this requirement;
(i) External radiation and contamination levels are within the allowable limits specified in this subchapter.