Show BASIC INSIGNIA tho the basic emblem of civilian defense consists of the initials CD in red set in white triangle within blue circle the basic insigne may bo be worn by all enrolled civilian defense workers it ai the tha only symbol allowed for use on headgear on which it may be reproduced in metal cloth felt or embroidered on 1101 helmets it may bo be stencilled stencil led for uniformed groups only the baste basic insigne may be worn on the lavole lapels of uniform coats it also may appear on stickers and plates for automobiles but in this form its use Is restricted to vehicles emp employed loyod in tile the work of civilian defense defenso Dof enso tho the us use e of the baso base insigne on flags and banners for or display ts its not restricted |