How much do you know about your passport? The International Civil Aviation Organization has outlined the following rules about these little books:
Made of a material that bends rather than creases.
Stable in temperatures between 14F-122F degrees.
Readable in humidity conditions between 5%-95%.
However, there are no stipulations about typeface, type size, font, and cover color, yet all countries have chosen shades of red, blue, green, and black for cover colors.
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