In March 1975, Mohammad Reza Shah abolished his sham two-party system and replaced it with his one-party system. In a chilling speech, Mohammad Reza Pahlavi ordered all Iranians from the 9th grade up to register to become a member of the Rastakhiz Party. The Shah declared:
“Those who believe in the Iranian Constitution, the Monarchical regime, and the principles of the White Revolution, must join the new party. Those who do not believe in these principles are traitors who must either go to prison or leave the country.”
source:
Misagh Parsa, Social Origins of the Iranian Revolution, p. 183.
