Special provision 337
ADR 2025 — special provision (SP) 337, Chapter 3.3.
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.