The  Ministry of Coal  has  the overall   responsibility  of  determining  policies  and  strategies   in  respect  of exploration  and  development of coal and   lignite reserves,  sanctioning of important projects of  high  value and for deciding  all related issues.  Under  the  administrative   control  of  the  Ministry,  these  key functions   are exercised through the Public Sector Undertakings, namely, Coal India Ltd.   and  its subsidiaries and Neyveli Lignite corporation Limited.  Other than Coal India Ltd. and Neyveli Lignite Corporation Ltd., the Ministry of Coal also has a joint venture with  Government of Andhra Pradesh  called  Singareni Collieries Company Limited. Government of Andhra Pradesh holds 51% equity and Government of India holds 49 % equity.