No person engaged in any of the activities enumerated in this chapter shall, while so engaged in such activities, discuss, reveal or purport to foretell anything pertaining to military camps, emplacements, troops movements, supply movements, military ordinance, location of plants or factories engaged in filling military orders, harbors, air fields, shipping or ship movements or any other thing similar in nature which might be detrimental to the internal or military security of the United States.
(`78 Code, § 5.18.170.) (Ord. 2315 § 1 (part), 1997.)