166. Defacing public notices. -If any person without lawful authority- (a) Pulls down or wilfully damages any board or document setup or posted by the order of a railway administration on a railway or any rolling stock; or (b) Obliterates or alters any letters or figures upon any such board or document or upon any rolling stock, He shall be punishable with imprisonment for a term, which may extend to one month, or with fine, which may extend to five hundred rupees, or with both.
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