Missouri Constitution Article I Sec. 3 – Powers of the people over internal affairs, constitution and form of government
[In order to assert our rights, acknowledge our duties, and proclaim the principles on which our government is founded, we declare:]
That the people of this state have the inherent, sole and exclusive right to regulate the internal government and police thereof, and to alter and abolish their constitution and form of government whenever they may deem it necessary to their safety and happiness, provided such change be not repugnant to the Constitution of the United States.