The constitution, drafted in 2006–07 and approved in 2009, provides for balanced executive, legislative, judicial, and electoral powers, as well as several levels of autonomy. The traditionally strong executive branch tends to overshadow the Congress, whose role is generally limited to debating and approving legislation initiated by the executive. The judiciary, consisting of the Supreme Court and departmental and lower courts, has long been riddled with corruption and inefficiency. Through revisions to the constitution in 1994, and subsequent laws, the government has initiated potentially far-reaching reforms in the judicial system as well as increasing decentralizing powers to departments, municipalities, and indigenous territories.