biggest reforms was the cessation of internal-political espionage. The agency has also boosted up its infrastructure and recruited more agents. It has been successful in stopping the earlier pattern of frequent terror attacks in India. The agency has also been successful in counter-intelligence. Workings The Group A (Gazetted) officers carry out coordination and higher-level management of the IB. Subsidiary Intelligence Bureaus (SIBs) are headed by officers of the rank of Joint Director or above, but smaller SIBs are also sometimes headed by Deputy Directors. The SIBs have their units at district headquarters headed by Assistant Director (AD) or Deputy Central Intelligence Officers (DCIO). The IB maintains a large number of field units and headquarters (which are under the control of Joint or Deputy Directors). It is through these offices and the intricate process of deputation that a very organic linkage between the state police agencies and the IB is maintained. In addition to these, at the national level the IB has several units (in some cases SIBs) to keep track of issues like terrorism, counter-intelligence, VIP security, threat assessment and sensitive areas (i.e. Jammu and Kashmir and such). IB officers (like their counterparts in R&AW) get monthly special pays and an extra one-month salary every year, as well as better promotions. IB Officers are either directly recruited or are deputed from CAPFs and Armed Forces. Constitutionality IB was created on 23 December 1887, by the British Secretary of State as a sub-sect of the Central Special Branch but there is no act of the Indian parliament nor executive order relating to the functioning of the IB. In 2013, a public interest litigant challenged the legality of IB. Ranks and insignia Besides the above posts, there are various other supporting and office posts in the Bureau as well. Media portrayal The Intelligence Bureau has been depicted in films such as Bad Aur Badnaam (Hindi, 1984), Mukhbiir (Hindi, 2008), Vande Matharam (Tamil, 2010), Kahaani (Hindi, 2012), Jism 2 (Hindi, 2012), Iru Mugan (Tamil, 2016), and Spyder (Tamil, Telugu, 2017). IB also featured in the Sony TV Series Yudh starring Amitabh Bachchan. See also List of Indian intelligence agencies Footnotes Notes References Further reading MacGregor, Lady (Ed.). The Life and Opinions of Major-General Sir Charles MacGregor. 2 vols. 1888, Edinburgh MacGregor, General Sir Charles. The Defence of India. Shimla: Government of India Press. 1884. Kulkarni. Sin of National Conscience. 2005. External links The