Municipal corporations and municipal committees are the two main types of urban local self-governing bodies in India. Municipal corporations are responsible for governing large cities with populations over 1 million, and have a general council led by a mayor. Municipal committees govern smaller cities between 20,000-3 million people, and have an elected board led by a chairman. Both bodies are responsible for obligatory functions like public health, sanitation, education and infrastructure, as well as optional functions like transport, culture and welfare activities. The key differences are that municipal corporations have more powers and deal directly with state governments, while municipal committees have less authority and report through district administrations.