Type B(U) and Type B(M) packages, if carried by air, shall not contain activities greater than the following:

(a) For low dispersible radioactive material: as authorized for the package design as specified in the certificate of approval;

(b) For special form radioactive material: 3 000 A1 or 100 000 A2, whichever is the lower; or

(c) For all other radioactive material: 3 000 A2.