Currently, emission limits are set for new diesel engine up to 800 kw for generator set application under the Environment (Protection) rules 1986.
In a recent notification, the ministry said that BEL has been exempted from complying with emission norms for only 20 diesel gensets of 113.2 kW to be used in 3D Tactical Control Radars System.
"The special dispensation for the emission norms shall be only for diesel gensets, not exceeding twenty in number, to be used in 3D Tactical Control Radars System, with the present design or configuration which shall be procured and used on or before June 30, 2015," it said.
The ministry also said BEL should ensure the gensets comply with emission norms as existing on June 30, 2013.
BEL currently deals with a wide spectrum of products ranging from radars to solar based solutions. It was set up way back in 1954 to meet the specialised electronic needs of the Indian defence services.