Penal Code (StGB)
§ 188 Insult, slander, and defamation directed against persons in political life
(1) If an insult (§ 185) is committed against a person who holds a position in the political life of the people, in public, in a gathering, or by disseminating content (§ 11 paragraph 3), out of motives related to the offended person's position in public life and if the act is capable of significantly impeding his public work, then the punishment is imprisonment for up to three years or a fine. The political life of the people extends down to the municipal level.
(2) Under the same conditions, slander (§ 186) is punishable by imprisonment for three months to five years and defamation (§ 187) is punishable by imprisonment for six months to five years.