"15 cm K.Gr. 18 and 21 cm Gr. 18 shell with Dopp.Z. S/90 fuzes from which the safety pins have been removed are no longer safe to be moved as the safety pin cannot be fully reinserted. These shells must therefore be fired either for time of for percussion. Rammed or blind shell without safety pins must not be loaded again. They are no longer safe to move and should be destroyed in accordance with H.Dv. 305. It is forbidden to remove the safety pin from a Dopp.Z. S/90 fuze for training or instructional purposes."