<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2009) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2009) (Learn how and when to remove this template message) </Td> </Tr> <P> The All India Services (AIS) comprises Civil Services of India, namely the Indian Administrative Service (IAS), the Indian Forest Service (IFS) and the Indian Police Service (IPS). A common unique feature of the All India Services is that the members of these services are recruited by the Centre (Union government in federal polity), but their services are placed under various State cadres, and they have the liability to serve both under the State and under the Centre . Due to the federal polity of the country, this is considered one of the tools that makes union government stronger than state governments . Officers of these three services comply to the All India Services Rules relating to pay, conduct, leave, various allowances etc . </P> <P> The Ministry of Personnel, Public Grievances and Pensions is the cadre controlling authority for the IAS, The Ministry of Environment, Forest and Climate Change for the IFS and The Ministry of Home Affairs for the IPS while examination for recruitment of IAS and IPS is conducted by the Union Public Service Commission (UPSC) on the basis of the annual Civil Services Examination, a common civil service examination, and for IFS on the basis of the IFS Examination . Since 2012 onwards, the preliminary (first test) of the two examinations are combined . These officers are recruited and trained by the Central Government, and then allotted to different State cadres . </P>

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