Every person having taken and subscribed to the oath or affirmation required by this chapter, who, while in the employ of, or service with, the state or any county, city, city and county, state agency, public district, or disaster council or emergency organization advocates or becomes a member of any party or organization, political or otherwise, that advocates the overthrow of the government of the United States by force or violence or other unlawful means, is guilty of a felony, and is punishable by imprisonment pursuant to subdivision (h) of Section 1170 of the Penal Code.