The Government of India Act of 1919 introduced several reforms to decentralize authority and increase self-governance in India. It separated central and provincial subjects to relax central control over provinces. It established a system of dyarchy, dividing provincial subjects into matters administered by governors with ministerial responsibility and those administered without. It also introduced bicameral legislatures with some elected representation and required some members of the Viceroy's executive council to be Indian. However, the act met with limited success and autonomy remained constrained.