Tangwai movement
Some one-party states only outlaw opposition parties, while allowing allied parties to exist as part of a permanent coalition such as a popular front. However, these parties are largely or completely subservient to the ruling party and must accept the ruling party's monopoly of power as a condition of their existence. Examples of this are the People's Republic of China under the United Front, the National Front in former East Germany and the Democratic Front for the Reunification of Korea in North Korea. Others may outlaw all other parties yet allow non-party members to run for legislative seats as independent, as was the case with Taiwan's Tangwai movement in the 1970s and 1980s, as well as the elections in the former Soviet Union. Still others may both outlaw all other parties and include party membership as a prerequisite for holding public office, such as in Turkmenistan under the rule of Saparmurat Niyazov or Zaire under Mobutu Sese Seko.