The Anarchical and Revolutionary Crimes Act, 1919, popularly known as the Rowlatt Act, was a legislative act passed by the Imperial Legislative Council in Delhi on March 18, 1919, indefinitely extending the emergency measures of preventive indefinite detention, incarceration without trial and judicial review enacted in the Defence of India Act 1915 during the First World War. It was enacted in light of a perceived threat from revolutionary nationalist organisations of re-engaging in similar conspiracies as duing the war which the Government felt the lapse of the DIRA regulations would enable. Passed on the recommendations of the Rowlatt Committee and named after its president, British judge Sir Sidney Rowlatt, this act effectively authorized the government to imprison any person suspected of terrorism living in the Raj for up to two years without a trial, and gave the imperial authorities power to deal with all revolutionary activities.
The unpopular legislation provided for stricter control of the press, arrests without warrant, indefinite detention without trial, and juryless in camera trials for proscribed political acts. The accused were denied the right to know the accusers and the evidence used in the trial.[6] Those convicted were required to deposit securities upon release, and were prohibited from taking part in any political, educational, or religious activities. On the report of the committee,headed by Justice Rowlatt, two bills were introduced in the central legislature in February 1919. These bills came to be known as "black bills". They gave enormous powers to the police to search a place and arrest any person they disapproved of without warrant. A well known description of the bills at that time was: No Dalil, No Vakil, No Appeal i.e., no pleas, no lawyer, no Appeal. Despite much opposition, the Rowlatt act was passed in March 1919. The purpose of the act was to curb the growing nationalist upsurge in the country.
Mohandas Karamchand Gandhi, among other Indian leaders, was extremely critical of the Act and argued that not everyone should get punishment in response to isolated political crimes. The Act annoyed many Indian leaders and the public, which caused the government to implement repressive measures. Gandhi and others found that constitutional opposition to the measure was fruitless, so on April 6, a "hartal" was organised where Indians would suspend all business and fast as a sign of their opposition and civil disobedience would be offered against specific law. This event is known as the Rowlatt Satyagraha.
However, the success of the hartal in Delhi, on March 30, was overshadowed by tensions running high, which resulted in rioting in the Punjab and other provinces. Deciding that Indians were not ready to make a stand consistent with the principle of nonviolence, an integral part of satyagraha, Gandhi suspended the resistance.
The Rowlatt Act came into effect in March 1919. In the Punjab the protest movement was very strong, and on April 10 two leaders of the congress, Dr. Satya Pal and Dr. Saifuddin Kitchlew, were arrested and taken to an unknown place.
The army was called into Punjab, and on April 13 people from neighbouring villages gathered for Baisakhi Day celebrations in Amritsar, which led to the infamous Jallianwala Bagh massacre of 1919.
Accepting the report of the Repressive Laws Committee, the Government of India repealed the Rowlatt Act, the Press Act, and twenty-two other laws in March 1922.
In the year 1919, the British Government passed a new rule called Rowlatt Act, under which the Government had the authority and power to arrest people and keep them in prisons without any trial if they are suspected with the charge of terrorism. The government also earned the power to refrain the newspapers from reporting and printing news. The Act was ill famed as `Black Act` by the people and Indians revolt in protest against the Rowlatt Act. 
