(1) In this regulation depleted uranium means uranium that (a) contains less than 0.72% of the radionuclide uranium-235; and(b) is being used as (i) radiation shielding for a container that is designed to contain radioactive substances; or(ii) ballast in an aircraft or vessel; and(c) is totally encased in a metallic sheath; and(d) is in solid massive form.(2) Each of the following dealings with depleted uranium is exempt from the operation of section 13(1) of the Act:(a) possession of the depleted uranium;(b) storage of the depleted uranium;(c) transport of the depleted uranium.(3) Depleted uranium is exempt from the operation of section 14 of the Act.